Merge branch 'perf/urgent' into perf/core, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

.mailmap

@@ -99,6 +99,7 @@ Sachin P Sant <ssant@in.ibm.com>
 Sam Ravnborg <sam@mars.ravnborg.org>
 Sascha Hauer <s.hauer@pengutronix.de>
 S.Çağlar Onur <caglar@pardus.org.tr>
+Shiraz Hashim <shiraz.linux.kernel@gmail.com> <shiraz.hashim@st.com>
 Simon Kelley <simon@thekelleys.org.uk>
 Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr>
 Stephen Hemminger <shemminger@osdl.org>

Documentation/DocBook/device-drivers.tmpl

@@ -276,7 +276,7 @@ X!Isound/sound_firmware.c
      </para>
 
      <sect1><title>Frame Buffer Memory</title>
-!Edrivers/video/fbmem.c
+!Edrivers/video/fbdev/core/fbmem.c
      </sect1>
 <!--
      <sect1><title>Frame Buffer Console</title>
@@ -284,7 +284,7 @@ X!Edrivers/video/console/fbcon.c
      </sect1>
 -->
      <sect1><title>Frame Buffer Colormap</title>
-!Edrivers/video/fbcmap.c
+!Edrivers/video/fbdev/core/fbcmap.c
      </sect1>
 <!-- FIXME:
   drivers/video/fbgen.c has no docs, which stuffs up the sgml.  Comment
@@ -294,11 +294,11 @@ X!Idrivers/video/fbgen.c
      </sect1>
 KAO -->
      <sect1><title>Frame Buffer Video Mode Database</title>
-!Idrivers/video/modedb.c
-!Edrivers/video/modedb.c
+!Idrivers/video/fbdev/core/modedb.c
+!Edrivers/video/fbdev/core/modedb.c
      </sect1>
      <sect1><title>Frame Buffer Macintosh Video Mode Database</title>
-!Edrivers/video/macmodes.c
+!Edrivers/video/fbdev/macmodes.c
      </sect1>
      <sect1><title>Frame Buffer Fonts</title>
         <para>

Documentation/DocBook/drm.tmpl

@@ -2285,6 +2285,11 @@ void intel_crt_init(struct drm_device *dev)
     <sect2>
       <title>Modeset Helper Functions Reference</title>
 !Edrivers/gpu/drm/drm_crtc_helper.c
+    </sect2>
+    <sect2>
+      <title>Output Probing Helper Functions Reference</title>
+!Pdrivers/gpu/drm/drm_probe_helper.c output probing helper overview
+!Edrivers/gpu/drm/drm_probe_helper.c
     </sect2>
     <sect2>
       <title>fbdev Helper Functions Reference</title>

Documentation/devicetree/bindings/arm/marvell,kirkwood.txt

@@ -0,0 +1,97 @@
+Marvell Kirkwood SoC Family Device Tree Bindings
+------------------------------------------------
+
+Boards with a SoC of the Marvell Kirkwook family, eg 88f6281
+
+* Required root node properties:
+compatible: must contain "marvell,kirkwood"
+
+In addition, the above compatible shall be extended with the specific
+SoC. Currently known SoC compatibles are:
+
+"marvell,kirkwood-88f6192"
+"marvell,kirkwood-88f6281"
+"marvell,kirkwood-88f6282"
+"marvell,kirkwood-88f6283"
+"marvell,kirkwood-88f6702"
+"marvell,kirkwood-98DX4122"
+
+And in addition, the compatible shall be extended with the specific
+board. Currently known boards are:
+
+"buffalo,lschlv2"
+"buffalo,lsxhl"
+"buffalo,lsxl"
+"dlink,dns-320"
+"dlink,dns-320-a1"
+"dlink,dns-325"
+"dlink,dns-325-a1"
+"dlink,dns-kirkwood"
+"excito,b3"
+"globalscale,dreamplug-003-ds2001"
+"globalscale,guruplug"
+"globalscale,guruplug-server-plus"
+"globalscale,sheevaplug"
+"globalscale,sheevaplug"
+"globalscale,sheevaplug-esata"
+"globalscale,sheevaplug-esata-rev13"
+"iom,iconnect"
+"iom,iconnect-1.1"
+"iom,ix2-200"
+"keymile,km_kirkwood"
+"lacie,cloudbox"
+"lacie,inetspace_v2"
+"lacie,laplug"
+"lacie,netspace_lite_v2"
+"lacie,netspace_max_v2"
+"lacie,netspace_mini_v2"
+"lacie,netspace_v2"
+"marvell,db-88f6281-bp"
+"marvell,db-88f6282-bp"
+"marvell,mv88f6281gtw-ge"
+"marvell,rd88f6281"
+"marvell,rd88f6281"
+"marvell,rd88f6281-a0"
+"marvell,rd88f6281-a1"
+"mpl,cec4"
+"mpl,cec4-10"
+"netgear,readynas"
+"netgear,readynas"
+"netgear,readynas-duo-v2"
+"netgear,readynas-nv+-v2"
+"plathome,openblocks-a6"
+"plathome,openblocks-a7"
+"raidsonic,ib-nas6210"
+"raidsonic,ib-nas6210-b"
+"raidsonic,ib-nas6220"
+"raidsonic,ib-nas6220-b"
+"raidsonic,ib-nas62x0"
+"seagate,dockstar"
+"seagate,goflexnet"
+"synology,ds109"
+"synology,ds110jv10"
+"synology,ds110jv20"
+"synology,ds110jv30"
+"synology,ds111"
+"synology,ds209"
+"synology,ds210jv10"
+"synology,ds210jv20"
+"synology,ds212"
+"synology,ds212jv10"
+"synology,ds212jv20"
+"synology,ds212pv10"
+"synology,ds409"
+"synology,ds409slim"
+"synology,ds410j"
+"synology,ds411"
+"synology,ds411j"
+"synology,ds411slim"
+"synology,ds413jv10"
+"synology,rs212"
+"synology,rs409"
+"synology,rs411"
+"synology,rs812"
+"usi,topkick"
+"usi,topkick-1281P2"
+"zyxel,nsa310"
+"zyxel,nsa310a"

Documentation/devicetree/bindings/i2c/trivial-devices.txt

@@ -13,8 +13,22 @@ ad,ad7414		SMBus/I2C Digital Temperature Sensor in 6-Pin SOT with SMBus Alert an
 ad,adm9240		ADM9240:  Complete System Hardware Monitor for uProcessor-Based Systems
 adi,adt7461		+/-1C TDM Extended Temp Range I.C
 adt7461			+/-1C TDM Extended Temp Range I.C
+adi,adt7473		+/-1C TDM Extended Temp Range I.C
+adi,adt7475		+/-1C TDM Extended Temp Range I.C
+adi,adt7476		+/-1C TDM Extended Temp Range I.C
+adi,adt7490		+/-1C TDM Extended Temp Range I.C
 at,24c08		i2c serial eeprom  (24cxx)
+atmel,24c00		i2c serial eeprom  (24cxx)
+atmel,24c01		i2c serial eeprom  (24cxx)
 atmel,24c02		i2c serial eeprom  (24cxx)
+atmel,24c04		i2c serial eeprom  (24cxx)
+atmel,24c16		i2c serial eeprom  (24cxx)
+atmel,24c32		i2c serial eeprom  (24cxx)
+atmel,24c64		i2c serial eeprom  (24cxx)
+atmel,24c128		i2c serial eeprom  (24cxx)
+atmel,24c256		i2c serial eeprom  (24cxx)
+atmel,24c512		i2c serial eeprom  (24cxx)
+atmel,24c1024		i2c serial eeprom  (24cxx)
 atmel,at97sc3204t	i2c trusted platform module (TPM)
 capella,cm32181		CM32181: Ambient Light Sensor
 catalyst,24c32		i2c serial eeprom
@@ -46,8 +60,10 @@ maxim,ds1050		5 Bit Programmable, Pulse-Width Modulator
 maxim,max1237		Low-Power, 4-/12-Channel, 2-Wire Serial, 12-Bit ADCs
 maxim,max6625		9-Bit/12-Bit Temperature Sensors with I²C-Compatible Serial Interface
 mc,rv3029c2		Real Time Clock Module with I2C-Bus
+national,lm63		Temperature sensor with integrated fan control
 national,lm75		I2C TEMP SENSOR
 national,lm80		Serial Interface ACPI-Compatible Microprocessor System Hardware Monitor
+national,lm85		Temperature sensor with integrated fan control
 national,lm92		±0.33°C Accurate, 12-Bit + Sign Temperature Sensor and Thermal Window Comparator with Two-Wire Interface
 nuvoton,npct501		i2c trusted platform module (TPM)
 nxp,pca9556		Octal SMBus and I2C registered interface

Documentation/devicetree/bindings/net/ethernet.txt

@@ -10,7 +10,7 @@ The following properties are common to the Ethernet controllers:
 - max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
   the maximum frame size (there's contradiction in ePAPR).
 - phy-mode: string, operation mode of the PHY interface; supported values are
-  "mii", "gmii", "sgmii", "tbi", "rev-mii", "rmii", "rgmii", "rgmii-id",
+  "mii", "gmii", "sgmii", "qsgmii", "tbi", "rev-mii", "rmii", "rgmii", "rgmii-id",
   "rgmii-rxid", "rgmii-txid", "rtbi", "smii", "xgmii"; this is now a de-facto
   standard property;
 - phy-connection-type: the same as "phy-mode" property but described in ePAPR;

Documentation/devicetree/bindings/serial/efm32-uart.txt

@@ -1,7 +1,7 @@
 * Energymicro efm32 UART
 
 Required properties:
-- compatible : Should be "efm32,uart"
+- compatible : Should be "energymicro,efm32-uart"
 - reg : Address and length of the register set
 - interrupts : Should contain uart interrupt
 
@@ -13,7 +13,7 @@ Optional properties:
 Example:
 
 uart@0x4000c400 {
-	compatible = "efm32,uart";
+	compatible = "energymicro,efm32-uart";
 	reg = <0x4000c400 0x400>;
 	interrupts = <15>;
 	efm32,location = <0>;

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -22,6 +22,7 @@ auo	AU Optronics Corporation
 avago	Avago Technologies
 bosch	Bosch Sensortec GmbH
 brcm	Broadcom Corporation
+buffalo	Buffalo, Inc.
 calxeda	Calxeda
 capella	Capella Microsystems, Inc
 cavium	Cavium, Inc.
@@ -33,15 +34,18 @@ cortina	Cortina Systems, Inc.
 crystalfontz	Crystalfontz America, Inc.
 dallas	Maxim Integrated Products (formerly Dallas Semiconductor)
 davicom	DAVICOM Semiconductor, Inc.
-dlink	D-Link Systems, Inc.
 denx	Denx Software Engineering
+digi	Digi International Inc.
+dlink	D-Link Corporation
 dmo	Data Modul AG
+ebv	EBV Elektronik
 edt	Emerging Display Technologies
 emmicro	EM Microelectronic
 epfl	Ecole Polytechnique Fédérale de Lausanne
 epson	Seiko Epson Corp.
 est	ESTeem Wireless Modems
 eukrea  Eukréa Electromatique
+excito	Excito
 fsl	Freescale Semiconductor
 GEFanuc	GE Fanuc Intelligent Platforms Embedded Systems, Inc.
 gef	GE Fanuc Intelligent Platforms Embedded Systems, Inc.
@@ -53,13 +57,17 @@ haoyu	Haoyu Microelectronic Co. Ltd.
 hisilicon	Hisilicon Limited.
 honeywell	Honeywell
 hp	Hewlett Packard
+i2se	I2SE GmbH
 ibm	International Business Machines (IBM)
 idt	Integrated Device Technologies, Inc.
+iom	Iomega Corporation
 img	Imagination Technologies Ltd.
 intel	Intel Corporation
 intercontrol	Inter Control Group
+isee	ISEE 2007 S.L.
 isl	Intersil
 karo	Ka-Ro electronics GmbH
+keymile	Keymile GmbH
 lacie	LaCie
 lantiq	Lantiq Semiconductor
 lg	LG Corporation
@@ -70,9 +78,12 @@ maxim	Maxim Integrated Products
 microchip	Microchip Technology Inc.
 mosaixtech	Mosaix Technologies, Inc.
 moxa	Moxa
+mpl	MPL AG
+mxicy	Macronix International Co., Ltd.
 national	National Semiconductor
 neonode		Neonode Inc.
 netgear	NETGEAR
+newhaven	Newhaven Display International
 nintendo	Nintendo
 nokia	Nokia
 nvidia	NVIDIA
@@ -82,10 +93,12 @@ opencores	OpenCores.org
 panasonic	Panasonic Corporation
 phytec	PHYTEC Messtechnik GmbH
 picochip	Picochip Ltd
+plathome	Plat'Home Co., Ltd.
 powervr	PowerVR (deprecated, use img)
 qca	Qualcomm Atheros, Inc.
 qcom	Qualcomm Technologies, Inc
 qnap	QNAP Systems, Inc.
+raidsonic	RaidSonic Technology GmbH
 ralink	Mediatek/Ralink Technology Corp.
 ramtron	Ramtron International
 realtek Realtek Semiconductor Corp.
@@ -95,6 +108,7 @@ rockchip	Fuzhou Rockchip Electronics Co., Ltd
 samsung	Samsung Semiconductor
 sbs	Smart Battery System
 schindler	Schindler
+seagate	Seagate Technology PLC
 sil	Silicon Image
 silabs	Silicon Laboratories
 simtek
@@ -111,6 +125,7 @@ ti	Texas Instruments
 tlm	Trusted Logic Mobility
 toshiba	Toshiba Corporation
 toumaz	Toumaz
+usi	Universal Scientifc Industrial Co., Ltd.
 v3	V3 Semiconductor
 via	VIA Technologies, Inc.
 voipac	Voipac Technologies s.r.o.
@@ -119,3 +134,4 @@ wlf	Wolfson Microelectronics
 wm	Wondermedia Technologies, Inc.
 xes	Extreme Engineering Solutions (X-ES)
 xlnx	Xilinx
+zyxel	ZyXEL Communications Corp.

Documentation/ja_JP/HOWTO

@@ -315,7 +315,7 @@ Andrew Morton が Linux-kernel メーリングリストにカーネルリリー
 もし、3.x.y カーネルが存在しない場合には、番号が一番大きい 3.x が
 最新の安定版カーネルです。
 
-3.x.y は "stable" チーム <stable@kernel.org> でメンテされており、必
+3.x.y は "stable" チーム <stable@vger.kernel.org> でメンテされており、必
 要に応じてリリースされます。通常のリリース期間は 2週間毎ですが、差し迫っ
 た問題がなければもう少し長くなることもあります。セキュリティ関連の問題
 の場合はこれに対してだいたいの場合、すぐにリリースがされます。

Documentation/ja_JP/stable_kernel_rules.txt

@@ -50,16 +50,16 @@ linux-2.6.29/Documentation/stable_kernel_rules.txt
 
 -stable ツリーにパッチを送付する手続き-
 
- - 上記の規則に従っているかを確認した後に、stable@kernel.org にパッチ
+ - 上記の規則に従っているかを確認した後に、stable@vger.kernel.org にパッチ
    を送る。
  - 送信者はパッチがキューに受け付けられた際には ACK を、却下された場合
    には NAK を受け取る。この反応は開発者たちのスケジュールによって、数
    日かかる場合がある。
  - もし受け取られたら、パッチは他の開発者たちと関連するサブシステムの
    メンテナーによるレビューのために -stable キューに追加される。
- - パッチに stable@kernel.org のアドレスが付加されているときには、それ
+ - パッチに stable@vger.kernel.org のアドレスが付加されているときには、それ
    が Linus のツリーに入る時に自動的に stable チームに email される。
- - セキュリティパッチはこのエイリアス (stable@kernel.org) に送られるべ
+ - セキュリティパッチはこのエイリアス (stable@vger.kernel.org) に送られるべ
    きではなく、代わりに security@kernel.org のアドレスに送られる。
 
 レビューサイクル-

Documentation/kernel-parameters.txt

@@ -804,13 +804,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	dhash_entries=	[KNL]
 			Set number of hash buckets for dentry cache.
 
-	digi=		[HW,SERIAL]
-			IO parameters + enable/disable command.
-
-	digiepca=	[HW,SERIAL]
-			See drivers/char/README.epca and
-			Documentation/serial/digiepca.txt.
-
 	disable=	[IPV6]
 			See Documentation/networking/ipv6.txt.
 
@@ -2939,9 +2932,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	rhash_entries=	[KNL,NET]
 			Set number of hash buckets for route cache
 
-	riscom8=	[HW,SERIAL]
-			Format: <io_board1>[,<io_board2>[,...<io_boardN>]]
-
 	ro		[KNL] Mount root device read-only on boot
 
 	root=		[KNL] Root filesystem
@@ -3083,9 +3073,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 	sonypi.*=	[HW] Sony Programmable I/O Control Device driver
 			See Documentation/laptops/sonypi.txt
 
-	specialix=	[HW,SERIAL] Specialix multi-serial port adapter
-			See Documentation/serial/specialix.txt.
-
 	spia_io_base=	[HW,MTD]
 	spia_fio_base=
 	spia_pedr=

Documentation/magic-number.txt

@@ -63,8 +63,6 @@ Magic Name            Number      Structure            File
 PG_MAGIC              'P'         pg_{read,write}_hdr include/linux/pg.h
 CMAGIC                0x0111      user              include/linux/a.out.h
 MKISS_DRIVER_MAGIC    0x04bf      mkiss_channel     drivers/net/mkiss.h
-RISCOM8_MAGIC         0x0907      riscom_port       drivers/char/riscom8.h
-SPECIALIX_MAGIC       0x0907      specialix_port    drivers/char/specialix_io8.h
 HDLC_MAGIC            0x239e      n_hdlc            drivers/char/n_hdlc.c
 APM_BIOS_MAGIC        0x4101      apm_user          arch/x86/kernel/apm_32.c
 CYCLADES_MAGIC        0x4359      cyclades_port     include/linux/cyclades.h
@@ -82,7 +80,6 @@ STRIP_MAGIC           0x5303      strip             drivers/net/strip.c
 X25_ASY_MAGIC         0x5303      x25_asy           drivers/net/x25_asy.h
 SIXPACK_MAGIC         0x5304      sixpack           drivers/net/hamradio/6pack.h
 AX25_MAGIC            0x5316      ax_disp           drivers/net/mkiss.h
-ESP_MAGIC             0x53ee      esp_struct        drivers/char/esp.h
 TTY_MAGIC             0x5401      tty_struct        include/linux/tty.h
 MGSL_MAGIC            0x5401      mgsl_info         drivers/char/synclink.c
 TTY_DRIVER_MAGIC      0x5402      tty_driver        include/linux/tty_driver.h
@@ -94,13 +91,10 @@ USB_BLUETOOTH_MAGIC   0x6d02      usb_bluetooth     drivers/usb/class/bluetty.c
 RFCOMM_TTY_MAGIC      0x6d02                        net/bluetooth/rfcomm/tty.c
 USB_SERIAL_PORT_MAGIC 0x7301      usb_serial_port   drivers/usb/serial/usb-serial.h
 CG_MAGIC              0x00090255  ufs_cylinder_group include/linux/ufs_fs.h
-A2232_MAGIC           0x000a2232  gs_port           drivers/char/ser_a2232.h
 RPORT_MAGIC           0x00525001  r_port            drivers/char/rocket_int.h
 LSEMAGIC              0x05091998  lse               drivers/fc4/fc.c
 GDTIOCTL_MAGIC        0x06030f07  gdth_iowr_str     drivers/scsi/gdth_ioctl.h
 RIEBL_MAGIC           0x09051990                    drivers/net/atarilance.c
-RIO_MAGIC             0x12345678  gs_port           drivers/char/rio/rio_linux.c
-SX_MAGIC              0x12345678  gs_port           drivers/char/sx.h
 NBD_REQUEST_MAGIC     0x12560953  nbd_request       include/linux/nbd.h
 RED_MAGIC2            0x170fc2a5  (any)             mm/slab.c
 BAYCOM_MAGIC          0x19730510  baycom_state      drivers/net/baycom_epp.c
@@ -116,7 +110,6 @@ ISDN_ASYNC_MAGIC      0x49344C01  modem_info        include/linux/isdn.h
 CTC_ASYNC_MAGIC       0x49344C01  ctc_tty_info      drivers/s390/net/ctctty.c
 ISDN_NET_MAGIC        0x49344C02  isdn_net_local_s  drivers/isdn/i4l/isdn_net_lib.h
 SAVEKMSG_MAGIC2       0x4B4D5347  savekmsg          arch/*/amiga/config.c
-STLI_BOARDMAGIC       0x4bc6c825  stlibrd           include/linux/istallion.h
 CS_STATE_MAGIC        0x4c4f4749  cs_state          sound/oss/cs46xx.c
 SLAB_C_MAGIC          0x4f17a36d  kmem_cache        mm/slab.c
 COW_MAGIC             0x4f4f4f4d  cow_header_v1     arch/um/drivers/ubd_user.c
@@ -127,10 +120,8 @@ SCC_MAGIC             0x52696368  gs_port           drivers/char/scc.h
 SAVEKMSG_MAGIC1       0x53415645  savekmsg          arch/*/amiga/config.c
 GDA_MAGIC             0x58464552  gda               arch/mips/include/asm/sn/gda.h
 RED_MAGIC1            0x5a2cf071  (any)             mm/slab.c
-STL_PORTMAGIC         0x5a7182c9  stlport           include/linux/stallion.h
 EEPROM_MAGIC_VALUE    0x5ab478d2  lanai_dev         drivers/atm/lanai.c
 HDLCDRV_MAGIC         0x5ac6e778  hdlcdrv_state     include/linux/hdlcdrv.h
-EPCA_MAGIC            0x5c6df104  channel           include/linux/epca.h
 PCXX_MAGIC            0x5c6df104  channel           drivers/char/pcxx.h
 KV_MAGIC              0x5f4b565f  kernel_vars_s     arch/mips/include/asm/sn/klkernvars.h
 I810_STATE_MAGIC      0x63657373  i810_state        sound/oss/i810_audio.c
@@ -142,17 +133,14 @@ SLOT_MAGIC            0x67267322  slot              drivers/hotplug/acpiphp.h
 LO_MAGIC              0x68797548  nbd_device        include/linux/nbd.h
 OPROFILE_MAGIC        0x6f70726f  super_block       drivers/oprofile/oprofilefs.h
 M3_STATE_MAGIC        0x734d724d  m3_state          sound/oss/maestro3.c
-STL_PANELMAGIC        0x7ef621a1  stlpanel          include/linux/stallion.h
 VMALLOC_MAGIC         0x87654320  snd_alloc_track   sound/core/memory.c
 KMALLOC_MAGIC         0x87654321  snd_alloc_track   sound/core/memory.c
 PWC_MAGIC             0x89DC10AB  pwc_device        drivers/usb/media/pwc.h
 NBD_REPLY_MAGIC       0x96744668  nbd_reply         include/linux/nbd.h
-STL_BOARDMAGIC        0xa2267f52  stlbrd            include/linux/stallion.h
 ENI155_MAGIC          0xa54b872d  midway_eprom	    drivers/atm/eni.h
 SCI_MAGIC             0xbabeface  gs_port           drivers/char/sh-sci.h
 CODA_MAGIC            0xC0DAC0DA  coda_file_info    fs/coda/coda_fs_i.h
 DPMEM_MAGIC           0xc0ffee11  gdt_pci_sram      drivers/scsi/gdth.h
-STLI_PORTMAGIC        0xe671c7a1  stliport          include/linux/istallion.h
 YAM_MAGIC             0xF10A7654  yam_port          drivers/net/hamradio/yam.c
 CCB_MAGIC             0xf2691ad2  ccb               drivers/scsi/ncr53c8xx.c
 QUEUE_MAGIC_FREE      0xf7e1c9a3  queue_entry       drivers/scsi/arm/queue.c

Documentation/serial/00-INDEX

@@ -2,23 +2,15 @@
 	- this file.
 README.cycladesZ
 	- info on Cyclades-Z firmware loading.
-digiepca.txt
-	- info on Digi Intl. {PC,PCI,EISA}Xx and Xem series cards.
 driver
 	- intro to the low level serial driver.
 moxa-smartio
 	- file with info on installing/using Moxa multiport serial driver.
 n_gsm.txt
 	- GSM 0710 tty multiplexer howto.
-riscom8.txt
-	- notes on using the RISCom/8 multi-port serial driver.
 rocket.txt
 	- info on the Comtrol RocketPort multiport serial driver.
 serial-rs485.txt
 	- info about RS485 structures and support in the kernel.
-specialix.txt
-	- info on hardware/driver for specialix IO8+ multiport serial card.
-sx.txt
-	- info on the Specialix SX/SI multiport serial driver.
 tty.txt
 	- guide to the locking policies of the tty layer.

Documentation/serial/digiepca.txt

@@ -1,98 +0,0 @@
-NOTE:  This driver is obsolete.  Digi provides a 2.6 driver (dgdm) at
-http://www.digi.com for PCI cards.  They no longer maintain this driver,
-and have no 2.6 driver for ISA cards.
-
-This driver requires a number of user-space tools.  They can be acquired from
-http://www.digi.com, but only works with 2.4 kernels.
-
-
-The Digi Intl. epca driver. 
-----------------------------
-The Digi Intl. epca driver for Linux supports the following boards:
-
-Digi PC/Xem, PC/Xr, PC/Xe, PC/Xi, PC/Xeve 
-Digi EISA/Xem, PCI/Xem, PCI/Xr 
-
-Limitations:
-------------
-Currently the driver only autoprobes for supported PCI boards. 
-
-The Linux MAKEDEV command does not support generating the Digiboard
-Devices.  Users executing digiConfig to setup EISA and PC series cards
-will have their device nodes automatically constructed (cud?? for ~CLOCAL,
-and ttyD?? for CLOCAL).  Users wishing to boot their board from the LILO
-prompt, or those users booting PCI cards may use buildDIGI to construct 
-the necessary nodes. 
-
-Notes:
-------
-This driver may be configured via LILO.  For users who have already configured
-their driver using digiConfig, configuring from LILO will override previous 
-settings.  Multiple boards may be configured by issuing multiple LILO command 
-lines.  For examples see the bottom of this document.
-
-Device names start at 0 and continue up.  Beware of this as previous Digi 
-drivers started device names with 1.
-
-PCI boards are auto-detected and configured by the driver.  PCI boards will
-be allocated device numbers (internally) beginning with the lowest PCI slot
-first.  In other words a PCI card in slot 3 will always have higher device
-nodes than a PCI card in slot 1. 
-
-LILO config examples:
----------------------
-Using LILO's APPEND command, a string of comma separated identifiers or 
-integers can be used to configure supported boards.  The six values in order 
-are:
-
-   Enable/Disable this card or Override,
-   Type of card: PC/Xe (AccelePort) (0), PC/Xeve (1), PC/Xem or PC/Xr (2), 
-                 EISA/Xem (3), PC/64Xe (4), PC/Xi (5), 
-   Enable/Disable alternate pin arrangement,
-   Number of ports on this card,
-   I/O Port where card is configured (in HEX if using string identifiers),
-   Base of memory window (in HEX if using string identifiers), 
-
-NOTE : PCI boards are auto-detected and configured.  Do not attempt to 
-configure PCI boards with the LILO append command.  If you wish to override
-previous configuration data (As set by digiConfig), but you do not wish to
-configure any specific card (Example if there are PCI cards in the system) 
-the following override command will accomplish this:
--> append="digi=2"
-
-Samples:
-   append="digiepca=E,PC/Xe,D,16,200,D0000"
-                  or
-   append="digi=1,0,0,16,512,851968"
-
-Supporting Tools:
------------------
-Supporting tools include digiDload, digiConfig, buildPCI, and ditty.  See
-drivers/char/README.epca for more details.  Note,
-this driver REQUIRES that digiDload be executed prior to it being used. 
-Failure to do this will result in an ENODEV error.
-
-Documentation:
---------------
-Complete documentation for this product may be found in the tool package. 
-
-Sources of information and support:
------------------------------------
-Digi Intl. support site for this product:
-
-->  http://www.digi.com
-
-Acknowledgments:
-----------------
-Much of this work (And even text) was derived from a similar document 
-supporting the original public domain DigiBoard driver Copyright (C)
-1994,1995 Troy De Jongh.  Many thanks to Christoph Lameter 
-(christoph@lameter.com) and Mike McLagan (mike.mclagan@linux.org) who authored 
-and contributed to the original document. 
-
-Changelog:
-----------
-10-29-04:	Update status of driver, remove dead links in document
-		James Nelson <james4765@gmail.com>
-
-2000 (?)	Original Document

Documentation/serial/riscom8.txt

@@ -1,36 +0,0 @@
-* NOTE - this is an unmaintained driver.  The original author cannot be located.
-
-SDL Communications is now SBS Technologies, and does not have any
-information on these ancient ISA cards on their website.
-
-James Nelson <james4765@gmail.com> - 12-12-2004
-
-	This is the README for RISCom/8 multi-port serial driver
-	(C) 1994-1996 D.Gorodchanin
-	See file LICENSE for terms and conditions.
-
-NOTE: English is not my native language. 
-      I'm sorry for any mistakes in this text.
-
-Misc. notes for RISCom/8 serial driver, in no particular order :)
-
-1) This driver can support up to 4 boards at time.
-   Use string "riscom8=0xXXX,0xXXX,0xXXX,0xXXX" at LILO prompt, for
-   setting I/O base addresses for boards. If you compile driver
-   as module use modprobe options "iobase=0xXXX iobase1=0xXXX iobase2=..."
-
-2) The driver partially supports famous 'setserial' program, you can use almost
-   any of its options, excluding port & irq settings.
-
-3) There are some misc. defines at the beginning of riscom8.c, please read the 
-   comments and try to change some of them in case of problems.
-
-4) I consider the current state of the driver as BETA.
-
-5) SDL Communications WWW page is http://www.sdlcomm.com.
-
-6) You can use the MAKEDEV program to create RISCom/8 /dev/ttyL* entries.
-
-7) Minor numbers for first board are 0-7, for second 8-15, etc.
-
-22 Apr 1996.

Documentation/serial/specialix.txt

@@ -1,383 +0,0 @@
-
-      specialix.txt  -- specialix IO8+ multiport serial driver readme.
-
-
-
-      Copyright (C) 1997  Roger Wolff (R.E.Wolff@BitWizard.nl)
-
-      Specialix pays for the development and support of this driver.
-      Please DO contact io8-linux@specialix.co.uk if you require
-      support.
-
-      This driver was developed in the BitWizard linux device
-      driver service. If you require a linux device driver for your
-      product, please contact devices@BitWizard.nl for a quote.
-
-      This code is firmly based on the riscom/8 serial driver,
-      written by Dmitry Gorodchanin. The specialix IO8+ card
-      programming information was obtained from the CL-CD1865 Data
-      Book, and Specialix document number 6200059: IO8+ Hardware
-      Functional Specification, augmented by document number 6200088:
-      Merak Hardware Functional Specification. (IO8+/PCI is also 
-      called Merak)
-
-
-      This program is free software; you can redistribute it and/or
-      modify it under the terms of the GNU General Public License as
-      published by the Free Software Foundation; either version 2 of
-      the License, or (at your option) any later version.
-
-      This program is distributed in the hope that it will be
-      useful, but WITHOUT ANY WARRANTY; without even the implied
-      warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-      PURPOSE.  See the GNU General Public License for more details.
-
-      You should have received a copy of the GNU General Public
-      License along with this program; if not, write to the Free
-      Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
-      USA.
-
-
-Intro
-=====
-
- 
-This file contains some random information, that I like to have online
-instead of in a manual that can get lost. Ever misplace your Linux
-kernel sources?  And the manual of one of the boards in your computer?
-
-
-Addresses and interrupts
-========================
-
-Address dip switch settings:
-The dip switch sets bits 2-9 of the IO address. 
-
-       9 8 7 6 5 4 3 2 
-     +-----------------+
-   0 | X   X X X X X X |
-     |                 |    =   IoBase = 0x100 
-   1 |   X             |
-     +-----------------+          ------ RS232 connectors ---->
-         
-         |    |    |
-       edge connector
-         |    |    |
-         V    V    V
-
-Base address 0x100 caused a conflict in one of my computers once.  I
-haven't the foggiest why. My Specialix card is now at 0x180.  My
-other computer runs just fine with the Specialix card at 0x100....
-The card occupies 4 addresses, but actually only two are really used.
-
-The PCI version doesn't have any dip switches. The BIOS assigns
-an IO address. 
-
-The driver now still autoprobes at 0x100, 0x180, 0x250 and 0x260.  If
-that causes trouble for you, please report that. I'll remove
-autoprobing then.
-
-The driver will tell the card what IRQ to use, so you don't have to
-change any jumpers to change the IRQ. Just use a command line
-argument (irq=xx) to the insmod program to set the interrupt.
-
-The BIOS assigns the IRQ on the PCI version. You have no say in what
-IRQ to use in that case. 
-
-If your specialix cards are not at the default locations, you can use
-the kernel command line argument "specialix=io0,irq0,io1,irq1...".
-Here "io0" is the io address for the first card, and "irq0" is the
-irq line that the first card should use. And so on. 
-
-Examples. 
-
-You use the driver as a module and have three cards at 0x100, 0x250
-and 0x180. And some way or another you want them detected in that
-order. Moreover irq 12 is taken (e.g. by your PS/2 mouse).
-
-  insmod specialix.o iobase=0x100,0x250,0x180 irq=9,11,15
-
-The same three cards, but now in the kernel would require you to
-add 
-
-   specialix=0x100,9,0x250,11,0x180,15
-
-to the command line. This would become 
-
-   append="specialix=0x100,9,0x250,11,0x180,15" 
-
-in your /etc/lilo.conf file if you use lilo. 
-
-The Specialix driver is slightly odd: It allows you to have the second
-or third card detected without having a first card. This has
-advantages and disadvantages. A slot that isn't filled by an ISA card,
-might be filled if a PCI card is detected. Thus if you have an ISA
-card at 0x250 and a PCI card, you would get:
-
-sx0: specialix IO8+ Board at 0x100 not found.
-sx1: specialix IO8+ Board at 0x180 not found.
-sx2: specialix IO8+ board detected at 0x250, IRQ 12, CD1865 Rev. B.
-sx3: specialix IO8+ Board at 0x260 not found.
-sx0: specialix IO8+ board detected at 0xd800, IRQ 9, CD1865 Rev. B.
-
-This would happen if you don't give any probe hints to the driver. 
-If you would specify:
-
-   specialix=0x250,11
-
-you'd get the following messages:
-
-sx0: specialix IO8+ board detected at 0x250, IRQ 11, CD1865 Rev. B.
-sx1: specialix IO8+ board detected at 0xd800, IRQ 9, CD1865 Rev. B.
-
-ISA probing is aborted after the IO address you gave is exhausted, and
-the PCI card is now detected as the second card. The ISA card is now
-also forced to IRQ11....
-
-
-Baud rates
-==========
-
-The rev 1.2 and below boards use a CL-CD1864. These chips can only 
-do 64kbit. The rev 1.3 and newer boards use a CL-CD1865. These chips
-are officially capable of 115k2.
-
-The Specialix card uses a 25MHz crystal (in times two mode, which in
-fact is a divided by two mode). This is not enough to reach the rated
-115k2 on all ports at the same time. With this clock rate you can only
-do 37% of this rate. This means that at 115k2 on all ports you are
-going to lose characters (The chip cannot handle that many incoming
-bits at this clock rate.) (Yes, you read that correctly: there is a
-limit to the number of -=bits=- per second that the chip can handle.)
-
-If you near the "limit" you will first start to see a graceful
-degradation in that the chip cannot keep the transmitter busy at all
-times. However with a central clock this slow, you can also get it to
-miss incoming characters. The driver will print a warning message when
-you are outside the official specs. The messages usually show up in
-the file /var/log/messages .
-
-The specialix card cannot reliably do 115k2. If you use it, you have
-to do "extensive testing" (*) to verify if it actually works.
-
-When "mgetty" communicates with my modem at 115k2 it reports:
-got: +++[0d]ATQ0V1H0[0d][0d][8a]O[cb][0d][8a]
-                            ^^^^ ^^^^    ^^^^ 
-
-The three characters that have the "^^^" under them have suffered a
-bit error in the highest bit. In conclusion: I've tested it, and found
-that it simply DOESN'T work for me. I also suspect that this is also
-caused by the baud rate being just a little bit out of tune. 
-
-I upgraded the crystal to 66Mhz on one of my Specialix cards. Works
-great! Contact me for details. (Voids warranty, requires a steady hand
-and more such restrictions....)
-
-
-(*) Cirrus logic CD1864 databook, page 40.
-
-
-Cables for the Specialix IO8+
-=============================
-
-The pinout of the connectors on the IO8+ is:
-
-     pin    short    direction    long name
-            name
-    Pin 1   DCD      input        Data Carrier Detect
-    Pin 2   RXD      input        Receive
-    Pin 3   DTR/RTS  output       Data Terminal Ready/Ready To Send
-    Pin 4   GND      -            Ground
-    Pin 5   TXD      output       Transmit
-    Pin 6   CTS      input        Clear To Send
-        
-    
-             -- 6  5  4  3  2  1 --
-             |                    |
-             |                    |
-             |                    |
-             |                    |
-             +-----          -----+
-                  |__________|
-                      clip
-    
-    Front view of an RJ12 connector. Cable moves "into" the paper.
-    (the plug is ready to plug into your mouth this way...)
-
-    
-    NULL cable. I don't know who is going to use these except for
-    testing purposes, but I tested the cards with this cable. (It 
-    took quite a while to figure out, so I'm not going to delete
-    it. So there! :-)
-    
-    
-    This end goes               This end needs
-    straight into the           some twists in
-    RJ12 plug.                  the wiring.
-       IO8+ RJ12                   IO8+ RJ12
-        1  DCD       white          -
-        -             -             1 DCD
-        2  RXD       black          5 TXD
-        3  DTR/RTS   red            6 CTS
-        4  GND       green          4 GND
-        5  TXD       yellow         2 RXD
-        6  CTS       blue           3 DTR/RTS
-    
-
-    Same NULL cable, but now sorted on the second column.
- 
-        1  DCD       white          -
-        -             -             1 DCD
-        5  TXD       yellow         2 RXD
-        6  CTS       blue           3 DTR/RTS
-        4  GND       green          4 GND
-        2  RXD       black          5 TXD
-        3  DTR/RTS   red            6 CTS
-    
-    
-    
-    This is a modem cable usable for hardware handshaking:
-        RJ12                        DB25           DB9
-        1   DCD      white          8 DCD          1 DCD
-        2   RXD      black          3 RXD          2 RXD
-        3   DTR/RTS  red            4 RTS          7 RTS
-        4   GND      green          7 GND          5 GND
-        5   TXD      yellow         2 TXD          3 TXD
-        6   CTS      blue           5 CTS          8 CTS
-                            +----   6 DSR          6 DSR
-                            +----  20 DTR          4 DTR
-
-    This is a modem cable usable for software handshaking:
-    It allows you to reset the modem using the DTR ioctls.
-    I (REW) have never tested this, "but xxxxxxxxxxxxx
-    says that it works." If you test this, please
-    tell me and I'll fill in your name on the xxx's.
-
-        RJ12                        DB25           DB9
-        1   DCD      white          8 DCD          1 DCD
-        2   RXD      black          3 RXD          2 RXD
-        3   DTR/RTS  red           20 DTR          4 DTR
-        4   GND      green          7 GND          5 GND
-        5   TXD      yellow         2 TXD          3 TXD
-        6   CTS      blue           5 CTS          8 CTS
-                            +----   6 DSR          6 DSR
-                            +----   4 RTS          7 RTS
-
-   I bought a 6 wire flat cable. It was colored as indicated.
-   Check that yours is the same before you trust me on this.
-   
- 
-Hardware handshaking issues.
-============================
-
-The driver can be told to operate in two different ways. The default
-behaviour is specialix.sx_rtscts = 0 where the pin behaves as DTR when
-hardware handshaking is off. It behaves as the RTS hardware
-handshaking signal when hardware handshaking is selected.
-
-When you use this, you have to use the appropriate cable. The
-cable will either be compatible with hardware handshaking or with
-software handshaking. So switching on the fly is not really an
-option.
-
-I actually prefer to use the "specialix.sx_rtscts=1" option.
-This makes the DTR/RTS pin always an RTS pin, and ioctls to
-change DTR are always ignored. I have a cable that is configured
-for this. 
-
-
-Ports and devices
-=================
-
-Port 0 is the one furthest from the card-edge connector.
-
-Devices:
-
-You should make the devices as follows:
-
-bash
-cd /dev
-for i in  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 \
-         16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
-do
-  echo -n "$i "
-  mknod /dev/ttyW$i c 75 $i
-  mknod /dev/cuw$i c 76 $i
-done
-echo ""
-
-If your system doesn't come with these devices preinstalled, bug your
-linux-vendor about this. They have had ample time to get this
-implemented by now.
-
-You cannot have more than 4 boards in one computer. The card only
-supports 4 different interrupts. If you really want this, contact me
-about this and I'll give you a few tips (requires soldering iron)....
-
-If you have enough PCI slots, you can probably use more than 4 PCI
-versions of the card though.... 
-
-The PCI version of the card cannot adhere to the mechanical part of
-the PCI spec because the 8 serial connectors are simply too large. If
-it doesn't fit in your computer, bring back the card.
-
-
-------------------------------------------------------------------------
-
-
-  Fixed bugs and restrictions:
-       - During initialization, interrupts are blindly turned on.
-            Having a shadow variable would cause an extra memory
-            access on every IO instruction. 
-       - The interrupt (on the card) should be disabled when we
-         don't allocate the Linux end of the interrupt. This allows 
-         a different driver/card to use it while all ports are not in
-         use..... (a la standard serial port)
-       == An extra _off variant of the sx_in and sx_out macros are
-          now available. They don't set the interrupt enable bit.
-          These are used during initialization. Normal operation uses
-          the old variant which enables the interrupt line.
-       - RTS/DTR issue needs to be implemented according to 
-         specialix' spec.
-            I kind of like the "determinism" of the current 
-            implementation. Compile time flag?
-       == Ok. Compile time flag! Default is how Specialix likes it.
-       == Now a config time flag! Gets saved in your config file. Neat!
-       - Can you set the IO address from the lilo command line?
-            If you need this, bug me about it, I'll make it. 
-       == Hah! No bugging needed. Fixed! :-)
-       - Cirrus logic hasn't gotten back to me yet why the CD1865 can
-            and the CD1864 can't do 115k2. I suspect that this is
-            because the CD1864 is not rated for 33MHz operation.
-            Therefore the CD1864 versions of the card can't do 115k2 on 
-            all ports just like the CD1865 versions. The driver does
-            not block 115k2 on CD1864 cards. 
-        == I called the Cirrus Logic representative here in Holland.
-           The CD1864 databook is identical to the CD1865 databook, 
-           except for an extra warning at the end. Similar Bit errors
-           have been observed in testing at 115k2 on both an 1865 and
-           a 1864 chip. I see no reason why I would prohibit 115k2 on
-           1864 chips and not do it on 1865 chips. Actually there is
-           reason to prohibit it on BOTH chips. I print a warning.
-           If you use 115k2, you're on your own. 
-       - A spiky CD may send spurious HUPs. Also in CLOCAL???
-         -- A fix for this turned out to be counter productive. 
-            Different fix? Current behaviour is acceptable?
-         -- Maybe the current implementation is correct. If anybody
-            gets bitten by this, please report, and it will get fixed.
-
-         -- Testing revealed that when in CLOCAL, the problem doesn't
-            occur. As warned for in the CD1865 manual, the chip may
-            send modem intr's on a spike. We could filter those out,
-            but that would be a cludge anyway (You'd still risk getting
-            a spurious HUP when two spikes occur.).....
- 
-
-
-  Bugs & restrictions:
-       - This is a difficult card to autoprobe.
-            You have to WRITE to the address register to even 
-            read-probe a CD186x register. Disable autodetection?
-         -- Specialix: any suggestions?
-
-

Documentation/serial/sx.txt

@@ -1,294 +0,0 @@
-
-      sx.txt  -- specialix SX/SI multiport serial driver readme.
-
-
-
-      Copyright (C) 1997  Roger Wolff (R.E.Wolff@BitWizard.nl)
-
-      Specialix pays for the development and support of this driver.
-      Please DO contact support@specialix.co.uk if you require
-      support.
-
-      This driver was developed in the BitWizard linux device
-      driver service. If you require a linux device driver for your
-      product, please contact devices@BitWizard.nl for a quote.
-
-      (History)
-      There used to be an SI driver by Simon Allan. This is a complete 
-      rewrite  from scratch. Just a few lines-of-code have been snatched.
-
-      (Sources)
-      Specialix document number 6210028: SX Host Card and Download Code
-      Software Functional Specification.
-
-      (Copying)
-      This program is free software; you can redistribute it and/or
-      modify it under the terms of the GNU General Public License as
-      published by the Free Software Foundation; either version 2 of
-      the License, or (at your option) any later version.
-
-      This program is distributed in the hope that it will be
-      useful, but WITHOUT ANY WARRANTY; without even the implied
-      warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-      PURPOSE.  See the GNU General Public License for more details.
-
-      You should have received a copy of the GNU General Public
-      License along with this program; if not, write to the Free
-      Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
-      USA.
-      
-      (Addendum)
-      I'd appreciate it that if you have fixes, that you send them
-      to me first. 
-
-
-Introduction
-============
-
-This file contains some random information, that I like to have online
-instead of in a manual that can get lost. Ever misplace your Linux
-kernel sources?  And the manual of one of the boards in your computer?
-
-
-Theory of operation
-===================
-
-An important thing to know is that the driver itself doesn't have the
-firmware for the card. This means that you need the separate package
-"sx_firmware". For now you can get the source at
-
-	ftp://ftp.bitwizard.nl/specialix/sx_firmware_<version>.tgz
-
-The firmware load needs a "misc" device, so you'll need to enable the
-"Support for user misc device modules" in your kernel configuration.
-The misc device needs to be called "/dev/specialix_sxctl". It needs
-misc major 10, and minor number 167 (assigned by HPA). The section
-on creating device files below also creates this device. 
-
-After loading the sx.o module into your kernel, the driver will report
-the number of cards detected, but because it doesn't have any
-firmware, it will not be able to determine the number of ports. Only
-when you then run "sx_firmware" will the firmware be downloaded and
-the rest of the driver initialized. At that time the sx_firmware
-program will report the number of ports installed.
-
-In contrast with many other multi port serial cards, some of the data
-structures are only allocated when the card knows the number of ports
-that are connected. This means we won't waste memory for 120 port
-descriptor structures when you only have 8 ports. If you experience
-problems due to this, please report them: I haven't seen any.
-
-
-Interrupts
-==========
-
-A multi port serial card, would generate a horrendous amount of
-interrupts if it would interrupt the CPU for every received
-character. Even more than 10 years ago, the trick not to use
-interrupts but to poll the serial cards was invented.
-
-The SX card allow us to do this two ways. First the card limits its
-own interrupt rate to a rate that won't overwhelm the CPU. Secondly,
-we could forget about the cards interrupt completely and use the
-internal timer for this purpose.
-
-Polling the card can take up to a few percent of your CPU. Using the
-interrupts would be better if you have most of the ports idle. Using
-timer-based polling is better if your card almost always has work to
-do. You save the separate interrupt in that case.
-
-In any case, it doesn't really matter all that much. 
-
-The most common problem with interrupts is that for ISA cards in a PCI
-system the BIOS has to be told to configure that interrupt as "legacy
-ISA". Otherwise the card can pull on the interrupt line all it wants
-but the CPU won't see this.
-
-If you can't get the interrupt to work, remember that polling mode is
-more efficient (provided you actually use the card intensively).
-
-
-Allowed Configurations
-======================
-
-Some configurations are disallowed. Even though at a glance they might
-seem to work, they are known to lockup the bus between the host card
-and the device concentrators. You should respect the drivers decision
-not to support certain configurations. It's there for a reason.
-
-Warning: Seriously technical stuff ahead. Executive summary: Don't use
-SX cards except configured at a 64k boundary. Skip the next paragraph.
-
-The SX cards can theoretically be placed at a 32k boundary. So for
-instance you can put an SX card at 0xc8000-0xd7fff. This is not a
-"recommended configuration". ISA cards have to tell the bus controller
-how they like their timing. Due to timing issues they have to do this
-based on which 64k window the address falls into. This means that the
-32k window below and above the SX card have to use exactly the same
-timing as the SX card. That reportedly works for other SX cards. But
-you're still left with two useless 32k windows that should not be used
-by anybody else.
-
-
-Configuring the driver
-======================
-
-PCI cards are always detected. The driver auto-probes for ISA cards at
-some sensible addresses. Please report if the auto-probe causes trouble
-in your system, or when a card isn't detected.
-
-I'm afraid I haven't implemented "kernel command line parameters" yet.
-This means that if the default doesn't work for you, you shouldn't use
-the compiled-into-the-kernel version of the driver. Use a module
-instead.  If you convince me that you need this, I'll make it for
-you. Deal?
-
-I'm afraid that the module parameters are a bit clumsy. If you have a
-better idea, please tell me.
-
-You can specify several parameters:
-
-	sx_poll: number of jiffies between timer-based polls.
-
-		Set this to "0" to disable timer based polls. 
-                Initialization of cards without a working interrupt
-                will fail.
-
-		Set this to "1" if you want a polling driver. 
-		(on Intel: 100 polls per second). If you don't use
-                fast baud rates, you might consider a value like "5". 
-                (If you don't know how to do the math, use 1).
-
-	sx_slowpoll: Number of jiffies between timer-based polls. 
- 		Set this to "100" to poll once a second. 
-		This should get the card out of a stall if the driver
-                ever misses an interrupt. I've never seen this happen,
-                and if it does, that's a bug. Tell me. 
-
-	sx_maxints: Number of interrupts to request from the card. 
-		The card normally limits interrupts to about 100 per
-		second to offload the host CPU. You can increase this
-		number to reduce latency on the card a little.
-		Note that if you give a very high number you can overload
-		your CPU as well as the CPU on the host card. This setting 
-		is inaccurate and not recommended for SI cards (But it 
-		works). 
-
-	sx_irqmask: The mask of allowable IRQs to use. I suggest you set 
-		this to 0 (disable IRQs all together) and use polling if 
-		the assignment of IRQs becomes problematic. This is defined
-		as the sum of (1 << irq) 's that you want to allow. So 
-		sx_irqmask of 8 (1 << 3) specifies that only irq 3 may
-		be used by the SX driver. If you want to specify to the 
-		driver: "Either irq 11 or 12 is ok for you to use", then
-		specify (1 << 11) | (1 << 12) = 0x1800 . 
-
-	sx_debug: You can enable different sorts of debug traces with this. 
-		At "-1" all debugging traces are active. You'll get several
-		times more debugging output than you'll get characters 
-		transmitted. 
-
-
-Baud rates
-==========
-
-Theoretically new SXDCs should be capable of more than 460k
-baud. However the line drivers usually give up before that.  Also the
-CPU on the card may not be able to handle 8 channels going at full
-blast at that speed. Moreover, the buffers are not large enough to
-allow operation with 100 interrupts per second. You'll have to realize
-that the card has a 256 byte buffer, so you'll have to increase the
-number of interrupts per second if you have more than 256*100 bytes
-per second to transmit.  If you do any performance testing in this
-area, I'd be glad to hear from you...
-
-(Psst Linux users..... I think the Linux driver is more efficient than
-the driver for other OSes. If you can and want to benchmark them
-against each other, be my guest, and report your findings...... :-)
-
-
-Ports and devices
-=================
-
-Port 0 is the top connector on the module closest to the host
-card. Oh, the ports on the SXDCs and TAs are labelled from 1 to 8
-instead of from 0 to 7, as they are numbered by linux. I'm stubborn in
-this: I know for sure that I wouldn't be able to calculate which port
-is which anymore if I would change that....
-
-
-Devices:
-
-You should make the device files as follows:
-
-#!/bin/sh
-# (I recommend that you cut-and-paste this into a file and run that)
-cd /dev
-t=0
-mknod specialix_sxctl c 10 167
-while [ $t -lt 64 ]
-  do 
-  echo -n "$t "
-  mknod ttyX$t c 32 $t
-  mknod cux$t  c 33 $t
-  t=`expr $t + 1`
-done
-echo ""
-rm /etc/psdevtab
-ps > /dev/null
-
-
-This creates 64 devices. If you have more, increase the constant on
-the line with "while". The devices start at 0, as is customary on
-Linux. Specialix seems to like starting the numbering at 1. 
-
-If your system doesn't come with these devices pre-installed, bug your
-linux-vendor about this. They should have these devices
-"pre-installed" before the new millennium. The "ps" stuff at the end
-is to "tell" ps that the new devices exist.
-
-Officially the maximum number of cards per computer is 4. This driver
-however supports as many cards in one machine as you want. You'll run
-out of interrupts after a few, but you can switch to polled operation
-then. At about 256 ports (More than 8 cards), we run out of minor
-device numbers. Sorry. I suggest you buy a second computer.... (Or
-switch to RIO).
-
-------------------------------------------------------------------------
-
-
-  Fixed bugs and restrictions:
-	- Hangup processing.  
-	  -- Done.
-
-	- the write path in generic_serial (lockup / oops). 
-	  -- Done (Ugly: not the way I want it. Copied from serial.c).
-
-        - write buffer isn't flushed at close.
-	  -- Done. I still seem to lose a few chars at close. 
-	     Sorry. I think that this is a firmware issue. (-> Specialix)
-
-	- drain hardware before  changing termios
-	- Change debug on the fly. 
-	- ISA free irq -1. (no firmware loaded).
-	- adding c8000 as a probe address. Added warning. 
-	- Add a RAMtest for the RAM on the card.c
-        - Crash when opening a port "way" of the number of allowed ports. 
-          (for example opening port 60 when there are only 24 ports attached)
-	- Sometimes the use-count strays a bit. After a few hours of
-          testing the use count is sometimes "3". If you are not like
-          me and can remember what you did to get it that way, I'd
-          appreciate an Email. Possibly fixed. Tell me if anyone still
-          sees this.
-	- TAs don't work right if you don't connect all the modem control
-	  signals. SXDCs do. T225 firmware problem -> Specialix. 
-	  (Mostly fixed now, I think. Tell me if you encounter this!)
-
-  Bugs & restrictions:
-
-	- Arbitrary baud rates. Requires firmware update. (-> Specialix)
-
-	- Low latency (mostly firmware, -> Specialix)
-
-
-

Documentation/stable_kernel_rules.txt

@@ -39,7 +39,7 @@ Procedure for submitting patches to the -stable tree:
    the stable tree without anything else needing to be done by the author
    or subsystem maintainer.
  - If the patch requires other patches as prerequisites which can be
-   cherry-picked than this can be specified in the following format in
+   cherry-picked, then this can be specified in the following format in
    the sign-off area:
 
      Cc: <stable@vger.kernel.org> # 3.3.x: a1f84a3: sched: Check for idle

Documentation/vm/numa_memory_policy.txt

@@ -174,7 +174,6 @@ Components of Memory Policies
 	allocation fails, the kernel will search other nodes, in order of
 	increasing distance from the preferred node based on information
 	provided by the platform firmware.
-	containing the cpu where the allocation takes place.
 
 	    Internally, the Preferred policy uses a single node--the
 	    preferred_node member of struct mempolicy.  When the internal
@@ -275,9 +274,9 @@ Components of Memory Policies
 	    For example, consider a task that is attached to a cpuset with
 	    mems 2-5 that sets an Interleave policy over the same set with
 	    MPOL_F_RELATIVE_NODES.  If the cpuset's mems change to 3-7, the
-	    interleave now occurs over nodes 3,5-6.  If the cpuset's mems
+	    interleave now occurs over nodes 3,5-7.  If the cpuset's mems
 	    then change to 0,2-3,5, then the interleave occurs over nodes
-	    0,3,5.
+	    0,2-3,5.
 
 	    Thanks to the consistent remapping, applications preparing
 	    nodemasks to specify memory policies using this flag should

Documentation/zh_CN/HOWTO

@@ -237,7 +237,7 @@ kernel.org网站的pub/linux/kernel/v2.6/目录下找到它。它的开发遵循
 如果没有2.6.x.y版本内核存在，那么最新的2.6.x版本内核就相当于是当前的稳定
 版内核。
 
-2.6.x.y版本由“稳定版”小组（邮件地址<stable@kernel.org>）维护，一般隔周发
+2.6.x.y版本由“稳定版”小组（邮件地址<stable@vger.kernel.org>）维护，一般隔周发
 布新版本。
 
 内核源码中的Documentation/stable_kernel_rules.txt文件具体描述了可被稳定

Documentation/zh_CN/io_ordering.txt

@@ -0,0 +1,67 @@
+Chinese translated version of Documentation/io_orderings.txt
+
+If you have any comment or update to the content, please contact the
+original document maintainer directly.  However, if you have a problem
+communicating in English you can also ask the Chinese maintainer for
+help.  Contact the Chinese maintainer if this translation is outdated
+or if there is a problem with the translation.
+
+Chinese maintainer: Lin Yongting <linyongting@gmail.com>
+---------------------------------------------------------------------
+Documentation/io_ordering.txt 的中文翻译
+
+如果想评论或更新本文的内容，请直接联系原文档的维护者。如果你使用英文
+交流有困难的话，也可以向中文版维护者求助。如果本翻译更新不及时或者翻
+译存在问题，请联系中文版维护者。
+
+中文版维护者： 林永听 Lin Yongting <linyongting@gmail.com>
+中文版翻译者： 林永听 Lin Yongting <linyongting@gmail.com>
+中文版校译者： 林永听 Lin Yongting <linyongting@gmail.com>
+
+
+以下为正文
+---------------------------------------------------------------------
+
+在某些平台上，所谓的内存映射I/O是弱顺序。在这些平台上，驱动开发者有责任
+保证I/O内存映射地址的写操作按程序图意的顺序达到设备。通常读取一个“安全”
+设备寄存器或桥寄存器，触发IO芯片清刷未处理的写操作到达设备后才处理读操作，
+而达到保证目的。驱动程序通常在spinlock保护的临界区退出之前使用这种技术。
+这也可以保证后面的写操作只在前面的写操作之后到达设备（这非常类似于内存
+屏障操作，mb()，不过仅适用于I/O）。
+
+假设一个设备驱动程的具体例子：
+
+        ...
+CPU A:  spin_lock_irqsave(&dev_lock, flags)
+CPU A:  val = readl(my_status);
+CPU A:  ...
+CPU A:  writel(newval, ring_ptr);
+CPU A:  spin_unlock_irqrestore(&dev_lock, flags)
+        ...
+CPU B:  spin_lock_irqsave(&dev_lock, flags)
+CPU B:  val = readl(my_status);
+CPU B:  ...
+CPU B:  writel(newval2, ring_ptr);
+CPU B:  spin_unlock_irqrestore(&dev_lock, flags)
+        ...
+
+上述例子中，设备可能会先接收到newval2的值，然后接收到newval的值，问题就
+发生了。不过很容易通过下面方法来修复：
+
+        ...
+CPU A:  spin_lock_irqsave(&dev_lock, flags)
+CPU A:  val = readl(my_status);
+CPU A:  ...
+CPU A:  writel(newval, ring_ptr);
+CPU A:  (void)readl(safe_register); /* 配置寄存器？*/
+CPU A:  spin_unlock_irqrestore(&dev_lock, flags)
+        ...
+CPU B:  spin_lock_irqsave(&dev_lock, flags)
+CPU B:  val = readl(my_status);
+CPU B:  ...
+CPU B:  writel(newval2, ring_ptr);
+CPU B:  (void)readl(safe_register); /* 配置寄存器？*/
+CPU B:  spin_unlock_irqrestore(&dev_lock, flags)
+
+在解决方案中，读取safe_register寄存器，触发IO芯片清刷未处理的写操作，
+再处理后面的读操作，防止引发数据不一致问题。

Documentation/zh_CN/magic-number.txt

@@ -63,8 +63,6 @@ struct tty_ldisc {
 PG_MAGIC              'P'         pg_{read,write}_hdr include/linux/pg.h
 CMAGIC                0x0111      user              include/linux/a.out.h
 MKISS_DRIVER_MAGIC    0x04bf      mkiss_channel     drivers/net/mkiss.h
-RISCOM8_MAGIC         0x0907      riscom_port       drivers/char/riscom8.h
-SPECIALIX_MAGIC       0x0907      specialix_port    drivers/char/specialix_io8.h
 HDLC_MAGIC            0x239e      n_hdlc            drivers/char/n_hdlc.c
 APM_BIOS_MAGIC        0x4101      apm_user          arch/x86/kernel/apm_32.c
 CYCLADES_MAGIC        0x4359      cyclades_port     include/linux/cyclades.h
@@ -82,7 +80,6 @@ STRIP_MAGIC           0x5303      strip             drivers/net/strip.c
 X25_ASY_MAGIC         0x5303      x25_asy           drivers/net/x25_asy.h
 SIXPACK_MAGIC         0x5304      sixpack           drivers/net/hamradio/6pack.h
 AX25_MAGIC            0x5316      ax_disp           drivers/net/mkiss.h
-ESP_MAGIC             0x53ee      esp_struct        drivers/char/esp.h
 TTY_MAGIC             0x5401      tty_struct        include/linux/tty.h
 MGSL_MAGIC            0x5401      mgsl_info         drivers/char/synclink.c
 TTY_DRIVER_MAGIC      0x5402      tty_driver        include/linux/tty_driver.h
@@ -94,13 +91,10 @@ USB_BLUETOOTH_MAGIC   0x6d02      usb_bluetooth     drivers/usb/class/bluetty.c
 RFCOMM_TTY_MAGIC      0x6d02                        net/bluetooth/rfcomm/tty.c
 USB_SERIAL_PORT_MAGIC 0x7301      usb_serial_port   drivers/usb/serial/usb-serial.h
 CG_MAGIC              0x00090255  ufs_cylinder_group include/linux/ufs_fs.h
-A2232_MAGIC           0x000a2232  gs_port           drivers/char/ser_a2232.h
 RPORT_MAGIC           0x00525001  r_port            drivers/char/rocket_int.h
 LSEMAGIC              0x05091998  lse               drivers/fc4/fc.c
 GDTIOCTL_MAGIC        0x06030f07  gdth_iowr_str     drivers/scsi/gdth_ioctl.h
 RIEBL_MAGIC           0x09051990                    drivers/net/atarilance.c
-RIO_MAGIC             0x12345678  gs_port           drivers/char/rio/rio_linux.c
-SX_MAGIC              0x12345678  gs_port           drivers/char/sx.h
 NBD_REQUEST_MAGIC     0x12560953  nbd_request       include/linux/nbd.h
 RED_MAGIC2            0x170fc2a5  (any)             mm/slab.c
 BAYCOM_MAGIC          0x19730510  baycom_state      drivers/net/baycom_epp.c
@@ -116,7 +110,6 @@ ISDN_ASYNC_MAGIC      0x49344C01  modem_info        include/linux/isdn.h
 CTC_ASYNC_MAGIC       0x49344C01  ctc_tty_info      drivers/s390/net/ctctty.c
 ISDN_NET_MAGIC        0x49344C02  isdn_net_local_s  drivers/isdn/i4l/isdn_net_lib.h
 SAVEKMSG_MAGIC2       0x4B4D5347  savekmsg          arch/*/amiga/config.c
-STLI_BOARDMAGIC       0x4bc6c825  stlibrd           include/linux/istallion.h
 CS_STATE_MAGIC        0x4c4f4749  cs_state          sound/oss/cs46xx.c
 SLAB_C_MAGIC          0x4f17a36d  kmem_cache        mm/slab.c
 COW_MAGIC             0x4f4f4f4d  cow_header_v1     arch/um/drivers/ubd_user.c
@@ -127,10 +120,8 @@ SCC_MAGIC             0x52696368  gs_port           drivers/char/scc.h
 SAVEKMSG_MAGIC1       0x53415645  savekmsg          arch/*/amiga/config.c
 GDA_MAGIC             0x58464552  gda               arch/mips/include/asm/sn/gda.h
 RED_MAGIC1            0x5a2cf071  (any)             mm/slab.c
-STL_PORTMAGIC         0x5a7182c9  stlport           include/linux/stallion.h
 EEPROM_MAGIC_VALUE    0x5ab478d2  lanai_dev         drivers/atm/lanai.c
 HDLCDRV_MAGIC         0x5ac6e778  hdlcdrv_state     include/linux/hdlcdrv.h
-EPCA_MAGIC            0x5c6df104  channel           include/linux/epca.h
 PCXX_MAGIC            0x5c6df104  channel           drivers/char/pcxx.h
 KV_MAGIC              0x5f4b565f  kernel_vars_s     arch/mips/include/asm/sn/klkernvars.h
 I810_STATE_MAGIC      0x63657373  i810_state        sound/oss/i810_audio.c
@@ -142,17 +133,14 @@ SLOT_MAGIC            0x67267322  slot              drivers/hotplug/acpiphp.h
 LO_MAGIC              0x68797548  nbd_device        include/linux/nbd.h
 OPROFILE_MAGIC        0x6f70726f  super_block       drivers/oprofile/oprofilefs.h
 M3_STATE_MAGIC        0x734d724d  m3_state          sound/oss/maestro3.c
-STL_PANELMAGIC        0x7ef621a1  stlpanel          include/linux/stallion.h
 VMALLOC_MAGIC         0x87654320  snd_alloc_track   sound/core/memory.c
 KMALLOC_MAGIC         0x87654321  snd_alloc_track   sound/core/memory.c
 PWC_MAGIC             0x89DC10AB  pwc_device        drivers/usb/media/pwc.h
 NBD_REPLY_MAGIC       0x96744668  nbd_reply         include/linux/nbd.h
-STL_BOARDMAGIC        0xa2267f52  stlbrd            include/linux/stallion.h
 ENI155_MAGIC          0xa54b872d  midway_eprom	    drivers/atm/eni.h
 SCI_MAGIC             0xbabeface  gs_port           drivers/char/sh-sci.h
 CODA_MAGIC            0xC0DAC0DA  coda_file_info    include/linux/coda_fs_i.h
 DPMEM_MAGIC           0xc0ffee11  gdt_pci_sram      drivers/scsi/gdth.h
-STLI_PORTMAGIC        0xe671c7a1  stliport          include/linux/istallion.h
 YAM_MAGIC             0xF10A7654  yam_port          drivers/net/hamradio/yam.c
 CCB_MAGIC             0xf2691ad2  ccb               drivers/scsi/ncr53c8xx.c
 QUEUE_MAGIC_FREE      0xf7e1c9a3  queue_entry       drivers/scsi/arm/queue.c

Documentation/zh_CN/stable_kernel_rules.txt

@@ -42,7 +42,7 @@ Documentation/stable_kernel_rules.txt 的中文翻译
 
 向稳定版代码树提交补丁的过程：
 
-  - 在确认了补丁符合以上的规则后，将补丁发送到stable@kernel.org。
+  - 在确认了补丁符合以上的规则后，将补丁发送到stable@vger.kernel.org。
   - 如果补丁被接受到队列里，发送者会收到一个ACK回复，如果没有被接受，收
     到的是NAK回复。回复需要几天的时间，这取决于开发者的时间安排。
   - 被接受的补丁会被加到稳定版本队列里，等待其他开发者的审查。

MAINTAINERS

@@ -8315,7 +8315,7 @@ F:	include/linux/compiler.h
 
 SPEAR PLATFORM SUPPORT
 M:	Viresh Kumar <viresh.linux@gmail.com>
-M:	Shiraz Hashim <shiraz.hashim@st.com>
+M:	Shiraz Hashim <shiraz.linux.kernel@gmail.com>
 L:	spear-devel@list.st.com
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 W:	http://www.st.com/spear

Makefile

@@ -1,7 +1,7 @@
 VERSION = 3
 PATCHLEVEL = 15
 SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION = -rc2
 NAME = Shuffling Zombie Juror
 
 # *DOCUMENTATION*

arch/arc/include/asm/barrier.h

@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __ASM_BARRIER_H
-#define __ASM_BARRIER_H
-
-#ifndef __ASSEMBLY__
-
-/* TODO-vineetg: Need to see what this does, don't we need sync anywhere */
-#define mb() __asm__ __volatile__ ("" : : : "memory")
-#define rmb() mb()
-#define wmb() mb()
-#define set_mb(var, value)  do { var = value; mb(); } while (0)
-#define set_wmb(var, value) do { var = value; wmb(); } while (0)
-#define read_barrier_depends()  mb()
-
-/* TODO-vineetg verify the correctness of macros here */
-#ifdef CONFIG_SMP
-#define smp_mb()        mb()
-#define smp_rmb()       rmb()
-#define smp_wmb()       wmb()
-#else
-#define smp_mb()        barrier()
-#define smp_rmb()       barrier()
-#define smp_wmb()       barrier()
-#endif
-
-#define smp_read_barrier_depends()      do { } while (0)
-
-#endif
-
-#endif

arch/arm/boot/dts/spear320-hmi.dts

@@ -1,7 +1,7 @@
 /*
  * DTS file for SPEAr320 Evaluation Baord
  *
- * Copyright 2012 Shiraz Hashim <shiraz.hashim@st.com>
+ * Copyright 2012 Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License

arch/arm/mach-spear/headsmp.S

@@ -3,7 +3,7 @@
  *
  * Picked from realview
  * Copyright (c) 2012 ST Microelectronics Limited
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as

arch/arm/mach-spear/platsmp.c

@@ -4,7 +4,7 @@
  * based upon linux/arch/arm/mach-realview/platsmp.c
  *
  * Copyright (C) 2012 ST Microelectronics Ltd.
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as

arch/arm/mach-spear/time.c

@@ -2,7 +2,7 @@
  * arch/arm/plat-spear/time.c
  *
  * Copyright (C) 2010 ST Microelectronics
- * Shiraz Hashim<shiraz.hashim@st.com>
+ * Shiraz Hashim<shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any

arch/mips/mm/cache.c

@@ -29,15 +29,15 @@ void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
 void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page,
 	unsigned long pfn);
 void (*flush_icache_range)(unsigned long start, unsigned long end);
+EXPORT_SYMBOL_GPL(flush_icache_range);
 void (*local_flush_icache_range)(unsigned long start, unsigned long end);
 
 void (*__flush_cache_vmap)(void);
 void (*__flush_cache_vunmap)(void);
 
 void (*__flush_kernel_vmap_range)(unsigned long vaddr, int size);
-void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
-
 EXPORT_SYMBOL_GPL(__flush_kernel_vmap_range);
+void (*__invalidate_kernel_vmap_range)(unsigned long vaddr, int size);
 
 /* MIPS specific cache operations */
 void (*flush_cache_sigtramp)(unsigned long addr);

arch/parisc/include/asm/shmparam.h

@@ -1,8 +1,7 @@
 #ifndef _ASMPARISC_SHMPARAM_H
 #define _ASMPARISC_SHMPARAM_H
 
-#define __ARCH_FORCE_SHMLBA 	1
-
-#define SHMLBA 0x00400000   /* attach addr needs to be 4 Mb aligned */
+#define SHMLBA	   PAGE_SIZE	/* attach addr a multiple of this */
+#define SHM_COLOUR 0x00400000	/* shared mappings colouring */
 
 #endif /* _ASMPARISC_SHMPARAM_H */

arch/parisc/kernel/cache.c

@@ -323,7 +323,8 @@ void flush_dcache_page(struct page *page)
 		 * specifically accesses it, of course) */
 
 		flush_tlb_page(mpnt, addr);
-		if (old_addr == 0 || (old_addr & (SHMLBA - 1)) != (addr & (SHMLBA - 1))) {
+		if (old_addr == 0 || (old_addr & (SHM_COLOUR - 1))
+				      != (addr & (SHM_COLOUR - 1))) {
 			__flush_cache_page(mpnt, addr, page_to_phys(page));
 			if (old_addr)
 				printk(KERN_ERR "INEQUIVALENT ALIASES 0x%lx and 0x%lx in file %s\n", old_addr, addr, mpnt->vm_file ? (char *)mpnt->vm_file->f_path.dentry->d_name.name : "(null)");

arch/parisc/kernel/sys_parisc.c

@@ -45,7 +45,7 @@
 
 static int get_offset(unsigned int last_mmap)
 {
-	return (last_mmap & (SHMLBA-1)) >> PAGE_SHIFT;
+	return (last_mmap & (SHM_COLOUR-1)) >> PAGE_SHIFT;
 }
 
 static unsigned long shared_align_offset(unsigned int last_mmap,
@@ -57,8 +57,8 @@ static unsigned long shared_align_offset(unsigned int last_mmap,
 static inline unsigned long COLOR_ALIGN(unsigned long addr,
 			 unsigned int last_mmap, unsigned long pgoff)
 {
-	unsigned long base = (addr+SHMLBA-1) & ~(SHMLBA-1);
-	unsigned long off  = (SHMLBA-1) &
+	unsigned long base = (addr+SHM_COLOUR-1) & ~(SHM_COLOUR-1);
+	unsigned long off  = (SHM_COLOUR-1) &
 		(shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT);
 
 	return base + off;
@@ -101,7 +101,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	if (flags & MAP_FIXED) {
 		if ((flags & MAP_SHARED) && last_mmap &&
 		    (addr - shared_align_offset(last_mmap, pgoff))
-				& (SHMLBA - 1))
+				& (SHM_COLOUR - 1))
 			return -EINVAL;
 		goto found_addr;
 	}
@@ -122,7 +122,7 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
 	info.length = len;
 	info.low_limit = mm->mmap_legacy_base;
 	info.high_limit = mmap_upper_limit();
-	info.align_mask = last_mmap ? (PAGE_MASK & (SHMLBA - 1)) : 0;
+	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
 	info.align_offset = shared_align_offset(last_mmap, pgoff);
 	addr = vm_unmapped_area(&info);
 
@@ -161,7 +161,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
 	if (flags & MAP_FIXED) {
 		if ((flags & MAP_SHARED) && last_mmap &&
 		    (addr - shared_align_offset(last_mmap, pgoff))
-			& (SHMLBA - 1))
+			& (SHM_COLOUR - 1))
 			return -EINVAL;
 		goto found_addr;
 	}
@@ -182,7 +182,7 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
 	info.length = len;
 	info.low_limit = PAGE_SIZE;
 	info.high_limit = mm->mmap_base;
-	info.align_mask = last_mmap ? (PAGE_MASK & (SHMLBA - 1)) : 0;
+	info.align_mask = last_mmap ? (PAGE_MASK & (SHM_COLOUR - 1)) : 0;
 	info.align_offset = shared_align_offset(last_mmap, pgoff);
 	addr = vm_unmapped_area(&info);
 	if (!(addr & ~PAGE_MASK))

arch/parisc/kernel/syscall_table.S

@@ -392,7 +392,7 @@
 	ENTRY_COMP(vmsplice)
 	ENTRY_COMP(move_pages)		/* 295 */
 	ENTRY_SAME(getcpu)
-	ENTRY_SAME(epoll_pwait)
+	ENTRY_COMP(epoll_pwait)
 	ENTRY_COMP(statfs64)
 	ENTRY_COMP(fstatfs64)
 	ENTRY_COMP(kexec_load)		/* 300 */

arch/parisc/lib/memcpy.c

@@ -470,7 +470,7 @@ static unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
 		return 0;
 
 	/* if a load or store fault occured we can get the faulty addr */
-	d = &__get_cpu_var(exception_data);
+	d = this_cpu_ptr(&exception_data);
 	fault_addr = d->fault_addr;
 
 	/* error in load or store? */

arch/parisc/mm/fault.c

@@ -151,7 +151,7 @@ int fixup_exception(struct pt_regs *regs)
 	fix = search_exception_tables(regs->iaoq[0]);
 	if (fix) {
 		struct exception_data *d;
-		d = &__get_cpu_var(exception_data);
+		d = this_cpu_ptr(&exception_data);
 		d->fault_ip = regs->iaoq[0];
 		d->fault_space = regs->isr;
 		d->fault_addr = regs->ior;

arch/powerpc/kernel/pci_64.c

@@ -208,7 +208,7 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
 			  unsigned long in_devfn)
 {
 	struct pci_controller* hose;
-	struct pci_bus *bus = NULL;
+	struct pci_bus *tmp_bus, *bus = NULL;
 	struct device_node *hose_node;
 
 	/* Argh ! Please forgive me for that hack, but that's the
@@ -229,10 +229,12 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus,
 	 * used on pre-domains setup. We return the first match
 	 */
 
-	list_for_each_entry(bus, &pci_root_buses, node) {
-		if (in_bus >= bus->number && in_bus <= bus->busn_res.end)
+	list_for_each_entry(tmp_bus, &pci_root_buses, node) {
+		if (in_bus >= tmp_bus->number &&
+		    in_bus <= tmp_bus->busn_res.end) {
+			bus = tmp_bus;
 			break;
-		bus = NULL;
+		}
 	}
 	if (bus == NULL || bus->dev.of_node == NULL)
 		return -ENODEV;

arch/powerpc/mm/numa.c

@@ -232,6 +232,7 @@ int __node_distance(int a, int b)
 
 	return distance;
 }
+EXPORT_SYMBOL(__node_distance);
 
 static void initialize_distance_lookup_table(int nid,
 		const __be32 *associativity)

arch/um/include/shared/os.h

@@ -136,6 +136,7 @@ extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
 extern int os_get_ifname(int fd, char *namebuf);
 extern int os_set_slip(int fd);
 extern int os_mode_fd(int fd, int mode);
+extern int os_fsync_file(int fd);
 
 extern int os_seek_file(int fd, unsigned long long offset);
 extern int os_open_file(const char *file, struct openflags flags, int mode);

arch/um/kernel/physmem.c

@@ -103,6 +103,7 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end,
 	 */
 	os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
 	os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE);
+	os_fsync_file(physmem_fd);
 
 	bootmap_size = init_bootmem(pfn, pfn + delta);
 	free_bootmem(__pa(reserve_end) + bootmap_size,

arch/um/os-Linux/file.c

@@ -237,6 +237,12 @@ void os_close_file(int fd)
 {
 	close(fd);
 }
+int os_fsync_file(int fd)
+{
+	if (fsync(fd) < 0)
+	    return -errno;
+	return 0;
+}
 
 int os_seek_file(int fd, unsigned long long offset)
 {

arch/um/os-Linux/main.c

@@ -151,6 +151,7 @@ int __init main(int argc, char **argv, char **envp)
 #endif
 
 	do_uml_initcalls();
+	change_sig(SIGPIPE, 0);
 	ret = linux_main(argc, argv);
 
 	/*

arch/um/os-Linux/mem.c

@@ -12,337 +12,117 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <sys/mman.h>
-#include <sys/param.h>
+#include <sys/vfs.h>
+#include <linux/magic.h>
 #include <init.h>
 #include <os.h>
 
-/* Modified by which_tmpdir, which is called during early boot */
-static char *default_tmpdir = "/tmp";
-
-/*
- *  Modified when creating the physical memory file and when checking
- * the tmp filesystem for usability, both happening during early boot.
- */
+/* Set by make_tempfile() during early boot. */
 static char *tempdir = NULL;
 
-static void __init find_tempdir(void)
+/* Check if dir is on tmpfs. Return 0 if yes, -1 if no or error. */
+static int __init check_tmpfs(const char *dir)
 {
-	const char *dirs[] = { "TMP", "TEMP", "TMPDIR", NULL };
-	int i;
-	char *dir = NULL;
-
-	if (tempdir != NULL)
-		/* We've already been called */
-		return;
-	for (i = 0; dirs[i]; i++) {
-		dir = getenv(dirs[i]);
-		if ((dir != NULL) && (*dir != '\0'))
-			break;
-	}
-	if ((dir == NULL) || (*dir == '\0'))
-		dir = default_tmpdir;
+	struct statfs st;
 
-	tempdir = malloc(strlen(dir) + 2);
-	if (tempdir == NULL) {
-		fprintf(stderr, "Failed to malloc tempdir, "
-			"errno = %d\n", errno);
-		return;
-	}
-	strcpy(tempdir, dir);
-	strcat(tempdir, "/");
-}
-
-/*
- * Remove bytes from the front of the buffer and refill it so that if there's a
- * partial string that we care about, it will be completed, and we can recognize
- * it.
- */
-static int pop(int fd, char *buf, size_t size, size_t npop)
-{
-	ssize_t n;
-	size_t len = strlen(&buf[npop]);
-
-	memmove(buf, &buf[npop], len + 1);
-	n = read(fd, &buf[len], size - len - 1);
-	if (n < 0)
-		return -errno;
-
-	buf[len + n] = '\0';
-	return 1;
-}
-
-/*
- * This will return 1, with the first character in buf being the
- * character following the next instance of c in the file.  This will
- * read the file as needed.  If there's an error, -errno is returned;
- * if the end of the file is reached, 0 is returned.
- */
-static int next(int fd, char *buf, size_t size, char c)
-{
-	ssize_t n;
-	char *ptr;
-
-	while ((ptr = strchr(buf, c)) == NULL) {
-		n = read(fd, buf, size - 1);
-		if (n == 0)
-			return 0;
-		else if (n < 0)
-			return -errno;
-
-		buf[n] = '\0';
+	printf("Checking if %s is on tmpfs...", dir);
+	if (statfs(dir, &st) < 0) {
+		printf("%s\n", strerror(errno));
+	} else if (st.f_type != TMPFS_MAGIC) {
+		printf("no\n");
+	} else {
+		printf("OK\n");
+		return 0;
 	}
-
-	return pop(fd, buf, size, ptr - buf + 1);
+	return -1;
 }
 
 /*
- * Decode an octal-escaped and space-terminated path of the form used by
- * /proc/mounts. May be used to decode a path in-place. "out" must be at least
- * as large as the input. The output is always null-terminated. "len" gets the
- * length of the output, excluding the trailing null. Returns 0 if a full path
- * was successfully decoded, otherwise an error.
+ * Choose the tempdir to use. We want something on tmpfs so that our memory is
+ * not subject to the host's vm.dirty_ratio. If a tempdir is specified in the
+ * environment, we use that even if it's not on tmpfs, but we warn the user.
+ * Otherwise, we try common tmpfs locations, and if no tmpfs directory is found
+ * then we fall back to /tmp.
  */
-static int decode_path(const char *in, char *out, size_t *len)
+static char * __init choose_tempdir(void)
 {
-	char *first = out;
-	int c;
+	static const char * const vars[] = {
+		"TMPDIR",
+		"TMP",
+		"TEMP",
+		NULL
+	};
+	static const char fallback_dir[] = "/tmp";
+	static const char * const tmpfs_dirs[] = {
+		"/dev/shm",
+		fallback_dir,
+		NULL
+	};
 	int i;
-	int ret = -EINVAL;
-	while (1) {
-		switch (*in) {
-		case '\0':
-			goto out;
-
-		case ' ':
-			ret = 0;
-			goto out;
-
-		case '\\':
-			in++;
-			c = 0;
-			for (i = 0; i < 3; i++) {
-				if (*in < '0' || *in > '7')
-					goto out;
-				c = (c << 3) | (*in++ - '0');
-			}
-			*(unsigned char *)out++ = (unsigned char) c;
-			break;
-
-		default:
-			*out++ = *in++;
-			break;
+	const char *dir;
+
+	printf("Checking environment variables for a tempdir...");
+	for (i = 0; vars[i]; i++) {
+		dir = getenv(vars[i]);
+		if ((dir != NULL) && (*dir != '\0')) {
+			printf("%s\n", dir);
+			if (check_tmpfs(dir) >= 0)
+				goto done;
+			else
+				goto warn;
 		}
 	}
+	printf("none found\n");
 
-out:
-	*out = '\0';
-	*len = out - first;
-	return ret;
-}
-
-/*
- * Computes the length of s when encoded with three-digit octal escape sequences
- * for the characters in chars.
- */
-static size_t octal_encoded_length(const char *s, const char *chars)
-{
-	size_t len = strlen(s);
-	while ((s = strpbrk(s, chars)) != NULL) {
-		len += 3;
-		s++;
-	}
-
-	return len;
-}
-
-enum {
-	OUTCOME_NOTHING_MOUNTED,
-	OUTCOME_TMPFS_MOUNT,
-	OUTCOME_NON_TMPFS_MOUNT,
-};
-
-/* Read a line of /proc/mounts data looking for a tmpfs mount at "path". */
-static int read_mount(int fd, char *buf, size_t bufsize, const char *path,
-		      int *outcome)
-{
-	int found;
-	int match;
-	char *space;
-	size_t len;
-
-	enum {
-		MATCH_NONE,
-		MATCH_EXACT,
-		MATCH_PARENT,
-	};
-
-	found = next(fd, buf, bufsize, ' ');
-	if (found != 1)
-		return found;
-
-	/*
-	 * If there's no following space in the buffer, then this path is
-	 * truncated, so it can't be the one we're looking for.
-	 */
-	space = strchr(buf, ' ');
-	if (space) {
-		match = MATCH_NONE;
-		if (!decode_path(buf, buf, &len)) {
-			if (!strcmp(buf, path))
-				match = MATCH_EXACT;
-			else if (!strncmp(buf, path, len)
-				 && (path[len] == '/' || !strcmp(buf, "/")))
-				match = MATCH_PARENT;
-		}
-
-		found = pop(fd, buf, bufsize, space - buf + 1);
-		if (found != 1)
-			return found;
-
-		switch (match) {
-		case MATCH_EXACT:
-			if (!strncmp(buf, "tmpfs", strlen("tmpfs")))
-				*outcome = OUTCOME_TMPFS_MOUNT;
-			else
-				*outcome = OUTCOME_NON_TMPFS_MOUNT;
-			break;
-
-		case MATCH_PARENT:
-			/* This mount obscures any previous ones. */
-			*outcome = OUTCOME_NOTHING_MOUNTED;
-			break;
-		}
+	for (i = 0; tmpfs_dirs[i]; i++) {
+		dir = tmpfs_dirs[i];
+		if (check_tmpfs(dir) >= 0)
+			goto done;
 	}
 
-	return next(fd, buf, bufsize, '\n');
+	dir = fallback_dir;
+warn:
+	printf("Warning: tempdir %s is not on tmpfs\n", dir);
+done:
+	/* Make a copy since getenv results may not remain valid forever. */
+	return strdup(dir);
 }
 
-/* which_tmpdir is called only during early boot */
-static int checked_tmpdir = 0;
-
 /*
- * Look for a tmpfs mounted at /dev/shm.  I couldn't find a cleaner
- * way to do this than to parse /proc/mounts.  statfs will return the
- * same filesystem magic number and fs id for both /dev and /dev/shm
- * when they are both tmpfs, so you can't tell if they are different
- * filesystems.  Also, there seems to be no other way of finding the
- * mount point of a filesystem from within it.
- *
- * If a /dev/shm tmpfs entry is found, then we switch to using it.
- * Otherwise, we stay with the default /tmp.
+ * Create an unlinked tempfile in a suitable tempdir. template must be the
+ * basename part of the template with a leading '/'.
  */
-static void which_tmpdir(void)
+static int __init make_tempfile(const char *template)
 {
+	char *tempname;
 	int fd;
-	int found;
-	int outcome;
-	char *path;
-	char *buf;
-	size_t bufsize;
 
-	if (checked_tmpdir)
-		return;
-
-	checked_tmpdir = 1;
-
-	printf("Checking for tmpfs mount on /dev/shm...");
-
-	path = realpath("/dev/shm", NULL);
-	if (!path) {
-		printf("failed to check real path, errno = %d\n", errno);
-		return;
-	}
-	printf("%s...", path);
-
-	/*
-	 * The buffer needs to be able to fit the full octal-escaped path, a
-	 * space, and a trailing null in order to successfully decode it.
-	 */
-	bufsize = octal_encoded_length(path, " \t\n\\") + 2;
-
-	if (bufsize < 128)
-		bufsize = 128;
-
-	buf = malloc(bufsize);
-	if (!buf) {
-		printf("malloc failed, errno = %d\n", errno);
-		goto out;
-	}
-	buf[0] = '\0';
-
-	fd = open("/proc/mounts", O_RDONLY);
-	if (fd < 0) {
-		printf("failed to open /proc/mounts, errno = %d\n", errno);
-		goto out1;
-	}
-
-	outcome = OUTCOME_NOTHING_MOUNTED;
-	while (1) {
-		found = read_mount(fd, buf, bufsize, path, &outcome);
-		if (found != 1)
-			break;
-	}
-
-	if (found < 0) {
-		printf("read returned errno %d\n", -found);
-	} else {
-		switch (outcome) {
-		case OUTCOME_TMPFS_MOUNT:
-			printf("OK\n");
-			default_tmpdir = "/dev/shm";
-			break;
-
-		case OUTCOME_NON_TMPFS_MOUNT:
-			printf("not tmpfs\n");
-			break;
-
-		default:
-			printf("nothing mounted on /dev/shm\n");
-			break;
+	if (tempdir == NULL) {
+		tempdir = choose_tempdir();
+		if (tempdir == NULL) {
+			fprintf(stderr, "Failed to choose tempdir: %s\n",
+				strerror(errno));
+			return -1;
 		}
 	}
 
-	close(fd);
-out1:
-	free(buf);
-out:
-	free(path);
-}
-
-static int __init make_tempfile(const char *template, char **out_tempname,
-				int do_unlink)
-{
-	char *tempname;
-	int fd;
-
-	which_tmpdir();
-	tempname = malloc(MAXPATHLEN);
+	tempname = malloc(strlen(tempdir) + strlen(template) + 1);
 	if (tempname == NULL)
 		return -1;
 
-	find_tempdir();
-	if ((tempdir == NULL) || (strlen(tempdir) >= MAXPATHLEN))
-		goto out;
-
-	if (template[0] != '/')
-		strcpy(tempname, tempdir);
-	else
-		tempname[0] = '\0';
-	strncat(tempname, template, MAXPATHLEN-1-strlen(tempname));
+	strcpy(tempname, tempdir);
+	strcat(tempname, template);
 	fd = mkstemp(tempname);
 	if (fd < 0) {
 		fprintf(stderr, "open - cannot create %s: %s\n", tempname,
 			strerror(errno));
 		goto out;
 	}
-	if (do_unlink && (unlink(tempname) < 0)) {
+	if (unlink(tempname) < 0) {
 		perror("unlink");
 		goto close;
 	}
-	if (out_tempname) {
-		*out_tempname = tempname;
-	} else
-		free(tempname);
+	free(tempname);
 	return fd;
 close:
 	close(fd);
@@ -351,14 +131,14 @@ out:
 	return -1;
 }
 
-#define TEMPNAME_TEMPLATE "vm_file-XXXXXX"
+#define TEMPNAME_TEMPLATE "/vm_file-XXXXXX"
 
 static int __init create_tmp_file(unsigned long long len)
 {
 	int fd, err;
 	char zero;
 
-	fd = make_tempfile(TEMPNAME_TEMPLATE, NULL, 1);
+	fd = make_tempfile(TEMPNAME_TEMPLATE);
 	if (fd < 0)
 		exit(1);
 
@@ -402,7 +182,6 @@ int __init create_mem_file(unsigned long long len)
 	return fd;
 }
 
-
 void __init check_tmpexec(void)
 {
 	void *addr;
@@ -410,14 +189,13 @@ void __init check_tmpexec(void)
 
 	addr = mmap(NULL, UM_KERN_PAGE_SIZE,
 		    PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, fd, 0);
-	printf("Checking PROT_EXEC mmap in %s...",tempdir);
-	fflush(stdout);
+	printf("Checking PROT_EXEC mmap in %s...", tempdir);
 	if (addr == MAP_FAILED) {
 		err = errno;
-		perror("failed");
+		printf("%s\n", strerror(err));
 		close(fd);
 		if (err == EPERM)
-			printf("%s must be not mounted noexec\n",tempdir);
+			printf("%s must be not mounted noexec\n", tempdir);
 		exit(1);
 	}
 	printf("OK\n");

arch/x86/kernel/cpu/mcheck/mce.c

@@ -598,7 +598,6 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 {
 	struct mce m;
 	int i;
-	unsigned long *v;
 
 	this_cpu_inc(mce_poll_count);
 
@@ -618,8 +617,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 		if (!(m.status & MCI_STATUS_VAL))
 			continue;
 
-		v = &get_cpu_var(mce_polled_error);
-		set_bit(0, v);
+		this_cpu_write(mce_polled_error, 1);
 		/*
 		 * Uncorrected or signalled events are handled by the exception
 		 * handler when it is enabled, so don't process those here.

arch/x86/kernel/cpu/mcheck/mce_intel.c

@@ -42,7 +42,7 @@ static DEFINE_PER_CPU(mce_banks_t, mce_banks_owned);
  * cmci_discover_lock protects against parallel discovery attempts
  * which could race against each other.
  */
-static DEFINE_RAW_SPINLOCK(cmci_discover_lock);
+static DEFINE_SPINLOCK(cmci_discover_lock);
 
 #define CMCI_THRESHOLD		1
 #define CMCI_POLL_INTERVAL	(30 * HZ)
@@ -144,14 +144,14 @@ static void cmci_storm_disable_banks(void)
 	int bank;
 	u64 val;
 
-	raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+	spin_lock_irqsave(&cmci_discover_lock, flags);
 	owned = __get_cpu_var(mce_banks_owned);
 	for_each_set_bit(bank, owned, MAX_NR_BANKS) {
 		rdmsrl(MSR_IA32_MCx_CTL2(bank), val);
 		val &= ~MCI_CTL2_CMCI_EN;
 		wrmsrl(MSR_IA32_MCx_CTL2(bank), val);
 	}
-	raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+	spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static bool cmci_storm_detect(void)
@@ -211,7 +211,7 @@ static void cmci_discover(int banks)
 	int i;
 	int bios_wrong_thresh = 0;
 
-	raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+	spin_lock_irqsave(&cmci_discover_lock, flags);
 	for (i = 0; i < banks; i++) {
 		u64 val;
 		int bios_zero_thresh = 0;
@@ -266,7 +266,7 @@ static void cmci_discover(int banks)
 			WARN_ON(!test_bit(i, __get_cpu_var(mce_poll_banks)));
 		}
 	}
-	raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+	spin_unlock_irqrestore(&cmci_discover_lock, flags);
 	if (mca_cfg.bios_cmci_threshold && bios_wrong_thresh) {
 		pr_info_once(
 			"bios_cmci_threshold: Some banks do not have valid thresholds set\n");
@@ -316,10 +316,10 @@ void cmci_clear(void)
 
 	if (!cmci_supported(&banks))
 		return;
-	raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+	spin_lock_irqsave(&cmci_discover_lock, flags);
 	for (i = 0; i < banks; i++)
 		__cmci_disable_bank(i);
-	raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+	spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static void cmci_rediscover_work_func(void *arg)
@@ -360,9 +360,9 @@ void cmci_disable_bank(int bank)
 	if (!cmci_supported(&banks))
 		return;
 
-	raw_spin_lock_irqsave(&cmci_discover_lock, flags);
+	spin_lock_irqsave(&cmci_discover_lock, flags);
 	__cmci_disable_bank(bank);
-	raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
+	spin_unlock_irqrestore(&cmci_discover_lock, flags);
 }
 
 static void intel_init_cmci(void)

arch/x86/kernel/cpu/perf_event_intel_rapl.c

@@ -543,7 +543,8 @@ static int rapl_cpu_prepare(int cpu)
 	if (phys_id < 0)
 		return -1;
 
-	if (!rdmsrl_safe(MSR_RAPL_POWER_UNIT, &msr_rapl_power_unit_bits))
+	/* protect rdmsrl() to handle virtualization */
+	if (rdmsrl_safe(MSR_RAPL_POWER_UNIT, &msr_rapl_power_unit_bits))
 		return -1;
 
 	pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu));

arch/x86/vdso/vdso-layout.lds.S

@@ -9,12 +9,9 @@ SECTIONS
 #ifdef BUILD_VDSO32
 #include <asm/vdso32.h>
 
-	.hpet_sect : {
-		hpet_page = . - VDSO_OFFSET(VDSO_HPET_PAGE);
-	} :text :hpet_sect
+	hpet_page = . - VDSO_OFFSET(VDSO_HPET_PAGE);
 
-	.vvar_sect : {
-		vvar = . - VDSO_OFFSET(VDSO_VVAR_PAGE);
+	vvar = . - VDSO_OFFSET(VDSO_VVAR_PAGE);
 
 	/* Place all vvars at the offsets in asm/vvar.h. */
 #define EMIT_VVAR(name, offset) vvar_ ## name = vvar + offset;
@@ -22,7 +19,6 @@ SECTIONS
 #include <asm/vvar.h>
 #undef __VVAR_KERNEL_LDS
 #undef EMIT_VVAR
-	} :text :vvar_sect
 #endif
 	. = SIZEOF_HEADERS;
 
@@ -61,7 +57,12 @@ SECTIONS
 	 */
 	. = ALIGN(0x100);
 
-	.text		: { *(.text*) }			:text	=0x90909090
+	.text		: { *(.text*) }			:text	=0x90909090,
+
+	/*
+	 * The comma above works around a bug in gold:
+	 * https://sourceware.org/bugzilla/show_bug.cgi?id=16804
+	 */
 
 	/DISCARD/ : {
 		*(.discard)
@@ -84,8 +85,4 @@ PHDRS
 	dynamic		PT_DYNAMIC	FLAGS(4);		/* PF_R */
 	note		PT_NOTE		FLAGS(4);		/* PF_R */
 	eh_frame_hdr	PT_GNU_EH_FRAME;
-#ifdef BUILD_VDSO32
-	vvar_sect	PT_NULL		FLAGS(4);		/* PF_R */
-	hpet_sect	PT_NULL		FLAGS(4);		/* PF_R */
-#endif
 }

arch/x86/xen/smp.c

@@ -441,10 +441,11 @@ static int xen_cpu_up(unsigned int cpu, struct task_struct *idle)
 	irq_ctx_init(cpu);
 #else
 	clear_tsk_thread_flag(idle, TIF_FORK);
+#endif
 	per_cpu(kernel_stack, cpu) =
 		(unsigned long)task_stack_page(idle) -
 		KERNEL_STACK_OFFSET + THREAD_SIZE;
-#endif
+
 	xen_setup_runstate_info(cpu);
 	xen_setup_timer(cpu);
 	xen_init_lock_cpu(cpu);

arch/x86/xen/spinlock.c

@@ -274,7 +274,7 @@ void __init xen_init_spinlocks(void)
 		printk(KERN_DEBUG "xen: PV spinlocks disabled\n");
 		return;
 	}
-
+	printk(KERN_DEBUG "xen: PV spinlocks enabled\n");
 	pv_lock_ops.lock_spinning = PV_CALLEE_SAVE(xen_lock_spinning);
 	pv_lock_ops.unlock_kick = xen_unlock_kick;
 }
@@ -290,6 +290,9 @@ static __init int xen_init_spinlocks_jump(void)
 	if (!xen_pvspin)
 		return 0;
 
+	if (!xen_domain())
+		return 0;
+
 	static_key_slow_inc(&paravirt_ticketlocks_enabled);
 	return 0;
 }

arch/x86/xen/xen-asm_32.S

@@ -75,6 +75,17 @@ ENDPROC(xen_sysexit)
  * stack state in whatever form its in, we keep things simple by only
  * using a single register which is pushed/popped on the stack.
  */
+
+.macro POP_FS
+1:
+	popw %fs
+.pushsection .fixup, "ax"
+2:	movw $0, (%esp)
+	jmp 1b
+.popsection
+	_ASM_EXTABLE(1b,2b)
+.endm
+
 ENTRY(xen_iret)
 	/* test eflags for special cases */
 	testl $(X86_EFLAGS_VM | XEN_EFLAGS_NMI), 8(%esp)
@@ -83,15 +94,13 @@ ENTRY(xen_iret)
 	push %eax
 	ESP_OFFSET=4	# bytes pushed onto stack
 
-	/*
-	 * Store vcpu_info pointer for easy access.  Do it this way to
-	 * avoid having to reload %fs
-	 */
+	/* Store vcpu_info pointer for easy access */
 #ifdef CONFIG_SMP
-	GET_THREAD_INFO(%eax)
-	movl %ss:TI_cpu(%eax), %eax
-	movl %ss:__per_cpu_offset(,%eax,4), %eax
-	mov %ss:xen_vcpu(%eax), %eax
+	pushw %fs
+	movl $(__KERNEL_PERCPU), %eax
+	movl %eax, %fs
+	movl %fs:xen_vcpu, %eax
+	POP_FS
 #else
 	movl %ss:xen_vcpu, %eax
 #endif

drivers/Makefile

@@ -53,8 +53,8 @@ obj-y				+= gpu/
 obj-$(CONFIG_CONNECTOR)		+= connector/
 
 # i810fb and intelfb depend on char/agp/
-obj-$(CONFIG_FB_I810)           += video/i810/
-obj-$(CONFIG_FB_INTEL)          += video/intelfb/
+obj-$(CONFIG_FB_I810)           += video/fbdev/i810/
+obj-$(CONFIG_FB_INTEL)          += video/fbdev/intelfb/
 
 obj-$(CONFIG_PARPORT)		+= parport/
 obj-y				+= base/ block/ misc/ mfd/ nfc/

drivers/base/core.c

@@ -614,39 +614,6 @@ void device_remove_bin_file(struct device *dev,
 }
 EXPORT_SYMBOL_GPL(device_remove_bin_file);
 
-/**
- * device_schedule_callback_owner - helper to schedule a callback for a device
- * @dev: device.
- * @func: callback function to invoke later.
- * @owner: module owning the callback routine
- *
- * Attribute methods must not unregister themselves or their parent device
- * (which would amount to the same thing).  Attempts to do so will deadlock,
- * since unregistration is mutually exclusive with driver callbacks.
- *
- * Instead methods can call this routine, which will attempt to allocate
- * and schedule a workqueue request to call back @func with @dev as its
- * argument in the workqueue's process context.  @dev will be pinned until
- * @func returns.
- *
- * This routine is usually called via the inline device_schedule_callback(),
- * which automatically sets @owner to THIS_MODULE.
- *
- * Returns 0 if the request was submitted, -ENOMEM if storage could not
- * be allocated, -ENODEV if a reference to @owner isn't available.
- *
- * NOTE: This routine won't work if CONFIG_SYSFS isn't set!  It uses an
- * underlying sysfs routine (since it is intended for use by attribute
- * methods), and if sysfs isn't available you'll get nothing but -ENOSYS.
- */
-int device_schedule_callback_owner(struct device *dev,
-		void (*func)(struct device *), struct module *owner)
-{
-	return sysfs_schedule_callback(&dev->kobj,
-			(void (*)(void *)) func, dev, owner);
-}
-EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
-
 static void klist_children_get(struct klist_node *n)
 {
 	struct device_private *p = to_device_private_parent(n);

drivers/base/dd.c

@@ -187,8 +187,8 @@ static void driver_bound(struct device *dev)
 		return;
 	}
 
-	pr_debug("driver: '%s': %s: bound to device '%s'\n", dev_name(dev),
-		 __func__, dev->driver->name);
+	pr_debug("driver: '%s': %s: bound to device '%s'\n", dev->driver->name,
+		 __func__, dev_name(dev));
 
 	klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
 

drivers/base/topology.c

@@ -39,8 +39,7 @@
 static ssize_t show_##name(struct device *dev,			\
 		struct device_attribute *attr, char *buf)	\
 {								\
-	unsigned int cpu = dev->id;				\
-	return sprintf(buf, "%d\n", topology_##name(cpu));	\
+	return sprintf(buf, "%d\n", topology_##name(dev->id));	\
 }
 
 #if defined(topology_thread_cpumask) || defined(topology_core_cpumask) || \

drivers/char/Kconfig

@@ -40,7 +40,7 @@ config SGI_MBCS
 source "drivers/tty/serial/Kconfig"
 
 config TTY_PRINTK
-	bool "TTY driver to output user messages via printk"
+	tristate "TTY driver to output user messages via printk"
 	depends on EXPERT && TTY
 	default n
 	---help---

drivers/char/ipmi/Kconfig

@@ -50,6 +50,18 @@ config IPMI_SI
 	 Currently, only KCS and SMIC are supported.  If
 	 you are using IPMI, you should probably say "y" here.
 
+config IPMI_SI_PROBE_DEFAULTS
+       bool 'Probe for all possible IPMI system interfaces by default'
+       default n
+       depends on IPMI_SI
+       help
+	 Modern systems will usually expose IPMI interfaces via a discoverable
+	 firmware mechanism such as ACPI or DMI. Older systems do not, and so
+	 the driver is forced to probe hardware manually. This may cause boot
+	 delays. Say "n" here to disable this manual probing. IPMI will then
+	 only be available on older systems if the "ipmi_si_intf.trydefaults=1"
+	 boot argument is passed.
+
 config IPMI_WATCHDOG
        tristate 'IPMI Watchdog Timer'
        help

drivers/char/ipmi/ipmi_bt_sm.c

@@ -352,7 +352,7 @@ static inline void write_all_bytes(struct si_sm_data *bt)
 
 static inline int read_all_bytes(struct si_sm_data *bt)
 {
-	unsigned char i;
+	unsigned int i;
 
 	/*
 	 * length is "framing info", minimum = 4: NetFn, Seq, Cmd, cCode.

drivers/char/ipmi/ipmi_kcs_sm.c

@@ -251,8 +251,9 @@ static inline int check_obf(struct si_sm_data *kcs, unsigned char status,
 	if (!GET_STATUS_OBF(status)) {
 		kcs->obf_timeout -= time;
 		if (kcs->obf_timeout < 0) {
-		    start_error_recovery(kcs, "OBF not ready in time");
-		    return 1;
+			kcs->obf_timeout = OBF_RETRY_TIMEOUT;
+			start_error_recovery(kcs, "OBF not ready in time");
+			return 1;
 		}
 		return 0;
 	}

drivers/char/ipmi/ipmi_msghandler.c

@@ -55,6 +55,7 @@ static struct ipmi_recv_msg *ipmi_alloc_recv_msg(void);
 static int ipmi_init_msghandler(void);
 static void smi_recv_tasklet(unsigned long);
 static void handle_new_recv_msgs(ipmi_smi_t intf);
+static void need_waiter(ipmi_smi_t intf);
 
 static int initialized;
 
@@ -73,14 +74,28 @@ static struct proc_dir_entry *proc_ipmi_root;
  */
 #define MAX_MSG_TIMEOUT		60000
 
+/* Call every ~1000 ms. */
+#define IPMI_TIMEOUT_TIME	1000
+
+/* How many jiffies does it take to get to the timeout time. */
+#define IPMI_TIMEOUT_JIFFIES	((IPMI_TIMEOUT_TIME * HZ) / 1000)
+
+/*
+ * Request events from the queue every second (this is the number of
+ * IPMI_TIMEOUT_TIMES between event requests).  Hopefully, in the
+ * future, IPMI will add a way to know immediately if an event is in
+ * the queue and this silliness can go away.
+ */
+#define IPMI_REQUEST_EV_TIME	(1000 / (IPMI_TIMEOUT_TIME))
+
 /*
  * The main "user" data structure.
  */
 struct ipmi_user {
 	struct list_head link;
 
-	/* Set to "0" when the user is destroyed. */
-	int valid;
+	/* Set to false when the user is destroyed. */
+	bool valid;
 
 	struct kref refcount;
 
@@ -92,7 +107,7 @@ struct ipmi_user {
 	ipmi_smi_t intf;
 
 	/* Does this interface receive IPMI events? */
-	int gets_events;
+	bool gets_events;
 };
 
 struct cmd_rcvr {
@@ -383,6 +398,9 @@ struct ipmi_smi {
 	unsigned int     waiting_events_count; /* How many events in queue? */
 	char             delivering_events;
 	char             event_msg_printed;
+	atomic_t         event_waiters;
+	unsigned int     ticks_to_req_ev;
+	int              last_needs_timer;
 
 	/*
 	 * The event receiver for my BMC, only really used at panic
@@ -395,7 +413,7 @@ struct ipmi_smi {
 
 	/* For handling of maintenance mode. */
 	int maintenance_mode;
-	int maintenance_mode_enable;
+	bool maintenance_mode_enable;
 	int auto_maintenance_timeout;
 	spinlock_t maintenance_mode_lock; /* Used in a timer... */
 
@@ -451,7 +469,6 @@ static DEFINE_MUTEX(ipmi_interfaces_mutex);
 static LIST_HEAD(smi_watchers);
 static DEFINE_MUTEX(smi_watchers_mutex);
 
-
 #define ipmi_inc_stat(intf, stat) \
 	atomic_inc(&(intf)->stats[IPMI_STAT_ ## stat])
 #define ipmi_get_stat(intf, stat) \
@@ -772,6 +789,7 @@ static int intf_next_seq(ipmi_smi_t           intf,
 		*seq = i;
 		*seqid = intf->seq_table[i].seqid;
 		intf->curr_seq = (i+1)%IPMI_IPMB_NUM_SEQ;
+		need_waiter(intf);
 	} else {
 		rv = -EAGAIN;
 	}
@@ -941,7 +959,7 @@ int ipmi_create_user(unsigned int          if_num,
 	new_user->handler = handler;
 	new_user->handler_data = handler_data;
 	new_user->intf = intf;
-	new_user->gets_events = 0;
+	new_user->gets_events = false;
 
 	if (!try_module_get(intf->handlers->owner)) {
 		rv = -ENODEV;
@@ -962,10 +980,15 @@ int ipmi_create_user(unsigned int          if_num,
 	 */
 	mutex_unlock(&ipmi_interfaces_mutex);
 
-	new_user->valid = 1;
+	new_user->valid = true;
 	spin_lock_irqsave(&intf->seq_lock, flags);
 	list_add_rcu(&new_user->link, &intf->users);
 	spin_unlock_irqrestore(&intf->seq_lock, flags);
+	if (handler->ipmi_watchdog_pretimeout) {
+		/* User wants pretimeouts, so make sure to watch for them. */
+		if (atomic_inc_return(&intf->event_waiters) == 1)
+			need_waiter(intf);
+	}
 	*user = new_user;
 	return 0;
 
@@ -1019,7 +1042,13 @@ int ipmi_destroy_user(ipmi_user_t user)
 	struct cmd_rcvr  *rcvr;
 	struct cmd_rcvr  *rcvrs = NULL;
 
-	user->valid = 0;
+	user->valid = false;
+
+	if (user->handler->ipmi_watchdog_pretimeout)
+		atomic_dec(&intf->event_waiters);
+
+	if (user->gets_events)
+		atomic_dec(&intf->event_waiters);
 
 	/* Remove the user from the interface's sequence table. */
 	spin_lock_irqsave(&intf->seq_lock, flags);
@@ -1155,25 +1184,23 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
 	if (intf->maintenance_mode != mode) {
 		switch (mode) {
 		case IPMI_MAINTENANCE_MODE_AUTO:
-			intf->maintenance_mode = mode;
 			intf->maintenance_mode_enable
 				= (intf->auto_maintenance_timeout > 0);
 			break;
 
 		case IPMI_MAINTENANCE_MODE_OFF:
-			intf->maintenance_mode = mode;
-			intf->maintenance_mode_enable = 0;
+			intf->maintenance_mode_enable = false;
 			break;
 
 		case IPMI_MAINTENANCE_MODE_ON:
-			intf->maintenance_mode = mode;
-			intf->maintenance_mode_enable = 1;
+			intf->maintenance_mode_enable = true;
 			break;
 
 		default:
 			rv = -EINVAL;
 			goto out_unlock;
 		}
+		intf->maintenance_mode = mode;
 
 		maintenance_mode_update(intf);
 	}
@@ -1184,7 +1211,7 @@ int ipmi_set_maintenance_mode(ipmi_user_t user, int mode)
 }
 EXPORT_SYMBOL(ipmi_set_maintenance_mode);
 
-int ipmi_set_gets_events(ipmi_user_t user, int val)
+int ipmi_set_gets_events(ipmi_user_t user, bool val)
 {
 	unsigned long        flags;
 	ipmi_smi_t           intf = user->intf;
@@ -1194,8 +1221,18 @@ int ipmi_set_gets_events(ipmi_user_t user, int val)
 	INIT_LIST_HEAD(&msgs);
 
 	spin_lock_irqsave(&intf->events_lock, flags);
+	if (user->gets_events == val)
+		goto out;
+
 	user->gets_events = val;
 
+	if (val) {
+		if (atomic_inc_return(&intf->event_waiters) == 1)
+			need_waiter(intf);
+	} else {
+		atomic_dec(&intf->event_waiters);
+	}
+
 	if (intf->delivering_events)
 		/*
 		 * Another thread is delivering events for this, so
@@ -1289,6 +1326,9 @@ int ipmi_register_for_cmd(ipmi_user_t   user,
 		goto out_unlock;
 	}
 
+	if (atomic_inc_return(&intf->event_waiters) == 1)
+		need_waiter(intf);
+
 	list_add_rcu(&rcvr->link, &intf->cmd_rcvrs);
 
  out_unlock:
@@ -1330,6 +1370,7 @@ int ipmi_unregister_for_cmd(ipmi_user_t   user,
 	mutex_unlock(&intf->cmd_rcvrs_mutex);
 	synchronize_rcu();
 	while (rcvrs) {
+		atomic_dec(&intf->event_waiters);
 		rcvr = rcvrs;
 		rcvrs = rcvr->next;
 		kfree(rcvr);
@@ -1535,7 +1576,7 @@ static int i_ipmi_request(ipmi_user_t          user,
 				= IPMI_MAINTENANCE_MODE_TIMEOUT;
 			if (!intf->maintenance_mode
 			    && !intf->maintenance_mode_enable) {
-				intf->maintenance_mode_enable = 1;
+				intf->maintenance_mode_enable = true;
 				maintenance_mode_update(intf);
 			}
 			spin_unlock_irqrestore(&intf->maintenance_mode_lock,
@@ -2876,6 +2917,8 @@ int ipmi_register_smi(struct ipmi_smi_handlers *handlers,
 		     (unsigned long) intf);
 	atomic_set(&intf->watchdog_pretimeouts_to_deliver, 0);
 	spin_lock_init(&intf->events_lock);
+	atomic_set(&intf->event_waiters, 0);
+	intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
 	INIT_LIST_HEAD(&intf->waiting_events);
 	intf->waiting_events_count = 0;
 	mutex_init(&intf->cmd_rcvrs_mutex);
@@ -3965,7 +4008,8 @@ smi_from_recv_msg(ipmi_smi_t intf, struct ipmi_recv_msg *recv_msg,
 
 static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 			      struct list_head *timeouts, long timeout_period,
-			      int slot, unsigned long *flags)
+			      int slot, unsigned long *flags,
+			      unsigned int *waiting_msgs)
 {
 	struct ipmi_recv_msg     *msg;
 	struct ipmi_smi_handlers *handlers;
@@ -3977,8 +4021,10 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 		return;
 
 	ent->timeout -= timeout_period;
-	if (ent->timeout > 0)
+	if (ent->timeout > 0) {
+		(*waiting_msgs)++;
 		return;
+	}
 
 	if (ent->retries_left == 0) {
 		/* The message has used all its retries. */
@@ -3995,6 +4041,8 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 		struct ipmi_smi_msg *smi_msg;
 		/* More retries, send again. */
 
+		(*waiting_msgs)++;
+
 		/*
 		 * Start with the max timer, set to normal timer after
 		 * the message is sent.
@@ -4040,117 +4088,118 @@ static void check_msg_timeout(ipmi_smi_t intf, struct seq_table *ent,
 	}
 }
 
-static void ipmi_timeout_handler(long timeout_period)
+static unsigned int ipmi_timeout_handler(ipmi_smi_t intf, long timeout_period)
 {
-	ipmi_smi_t           intf;
 	struct list_head     timeouts;
 	struct ipmi_recv_msg *msg, *msg2;
 	unsigned long        flags;
 	int                  i;
+	unsigned int         waiting_msgs = 0;
 
-	rcu_read_lock();
-	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-		tasklet_schedule(&intf->recv_tasklet);
-
-		/*
-		 * Go through the seq table and find any messages that
-		 * have timed out, putting them in the timeouts
-		 * list.
-		 */
-		INIT_LIST_HEAD(&timeouts);
-		spin_lock_irqsave(&intf->seq_lock, flags);
-		for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
-			check_msg_timeout(intf, &(intf->seq_table[i]),
-					  &timeouts, timeout_period, i,
-					  &flags);
-		spin_unlock_irqrestore(&intf->seq_lock, flags);
+	/*
+	 * Go through the seq table and find any messages that
+	 * have timed out, putting them in the timeouts
+	 * list.
+	 */
+	INIT_LIST_HEAD(&timeouts);
+	spin_lock_irqsave(&intf->seq_lock, flags);
+	for (i = 0; i < IPMI_IPMB_NUM_SEQ; i++)
+		check_msg_timeout(intf, &(intf->seq_table[i]),
+				  &timeouts, timeout_period, i,
+				  &flags, &waiting_msgs);
+	spin_unlock_irqrestore(&intf->seq_lock, flags);
 
-		list_for_each_entry_safe(msg, msg2, &timeouts, link)
-			deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
+	list_for_each_entry_safe(msg, msg2, &timeouts, link)
+		deliver_err_response(msg, IPMI_TIMEOUT_COMPLETION_CODE);
 
-		/*
-		 * Maintenance mode handling.  Check the timeout
-		 * optimistically before we claim the lock.  It may
-		 * mean a timeout gets missed occasionally, but that
-		 * only means the timeout gets extended by one period
-		 * in that case.  No big deal, and it avoids the lock
-		 * most of the time.
-		 */
+	/*
+	 * Maintenance mode handling.  Check the timeout
+	 * optimistically before we claim the lock.  It may
+	 * mean a timeout gets missed occasionally, but that
+	 * only means the timeout gets extended by one period
+	 * in that case.  No big deal, and it avoids the lock
+	 * most of the time.
+	 */
+	if (intf->auto_maintenance_timeout > 0) {
+		spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
 		if (intf->auto_maintenance_timeout > 0) {
-			spin_lock_irqsave(&intf->maintenance_mode_lock, flags);
-			if (intf->auto_maintenance_timeout > 0) {
-				intf->auto_maintenance_timeout
-					-= timeout_period;
-				if (!intf->maintenance_mode
-				    && (intf->auto_maintenance_timeout <= 0)) {
-					intf->maintenance_mode_enable = 0;
-					maintenance_mode_update(intf);
-				}
+			intf->auto_maintenance_timeout
+				-= timeout_period;
+			if (!intf->maintenance_mode
+			    && (intf->auto_maintenance_timeout <= 0)) {
+				intf->maintenance_mode_enable = false;
+				maintenance_mode_update(intf);
 			}
-			spin_unlock_irqrestore(&intf->maintenance_mode_lock,
-					       flags);
 		}
+		spin_unlock_irqrestore(&intf->maintenance_mode_lock,
+				       flags);
 	}
-	rcu_read_unlock();
+
+	tasklet_schedule(&intf->recv_tasklet);
+
+	return waiting_msgs;
 }
 
-static void ipmi_request_event(void)
+static void ipmi_request_event(ipmi_smi_t intf)
 {
-	ipmi_smi_t               intf;
 	struct ipmi_smi_handlers *handlers;
 
-	rcu_read_lock();
-	/*
-	 * Called from the timer, no need to check if handlers is
-	 * valid.
-	 */
-	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
-		/* No event requests when in maintenance mode. */
-		if (intf->maintenance_mode_enable)
-			continue;
+	/* No event requests when in maintenance mode. */
+	if (intf->maintenance_mode_enable)
+		return;
 
-		handlers = intf->handlers;
-		if (handlers)
-			handlers->request_events(intf->send_info);
-	}
-	rcu_read_unlock();
+	handlers = intf->handlers;
+	if (handlers)
+		handlers->request_events(intf->send_info);
 }
 
 static struct timer_list ipmi_timer;
 
-/* Call every ~1000 ms. */
-#define IPMI_TIMEOUT_TIME	1000
-
-/* How many jiffies does it take to get to the timeout time. */
-#define IPMI_TIMEOUT_JIFFIES	((IPMI_TIMEOUT_TIME * HZ) / 1000)
-
-/*
- * Request events from the queue every second (this is the number of
- * IPMI_TIMEOUT_TIMES between event requests).  Hopefully, in the
- * future, IPMI will add a way to know immediately if an event is in
- * the queue and this silliness can go away.
- */
-#define IPMI_REQUEST_EV_TIME	(1000 / (IPMI_TIMEOUT_TIME))
-
 static atomic_t stop_operation;
-static unsigned int ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
 
 static void ipmi_timeout(unsigned long data)
 {
+	ipmi_smi_t intf;
+	int nt = 0;
+
 	if (atomic_read(&stop_operation))
 		return;
 
-	ticks_to_req_ev--;
-	if (ticks_to_req_ev == 0) {
-		ipmi_request_event();
-		ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
-	}
+	rcu_read_lock();
+	list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
+		int lnt = 0;
+
+		if (atomic_read(&intf->event_waiters)) {
+			intf->ticks_to_req_ev--;
+			if (intf->ticks_to_req_ev == 0) {
+				ipmi_request_event(intf);
+				intf->ticks_to_req_ev = IPMI_REQUEST_EV_TIME;
+			}
+			lnt++;
+		}
 
-	ipmi_timeout_handler(IPMI_TIMEOUT_TIME);
+		lnt += ipmi_timeout_handler(intf, IPMI_TIMEOUT_TIME);
 
-	mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+		lnt = !!lnt;
+		if (lnt != intf->last_needs_timer &&
+					intf->handlers->set_need_watch)
+			intf->handlers->set_need_watch(intf->send_info, lnt);
+		intf->last_needs_timer = lnt;
+
+		nt += lnt;
+	}
+	rcu_read_unlock();
+
+	if (nt)
+		mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
 }
 
+static void need_waiter(ipmi_smi_t intf)
+{
+	/* Racy, but worst case we start the timer twice. */
+	if (!timer_pending(&ipmi_timer))
+		mod_timer(&ipmi_timer, jiffies + IPMI_TIMEOUT_JIFFIES);
+}
 
 static atomic_t smi_msg_inuse_count = ATOMIC_INIT(0);
 static atomic_t recv_msg_inuse_count = ATOMIC_INIT(0);

drivers/char/ipmi/ipmi_si_intf.c

@@ -217,7 +217,7 @@ struct smi_info {
 	unsigned char       msg_flags;
 
 	/* Does the BMC have an event buffer? */
-	char		    has_event_buffer;
+	bool		    has_event_buffer;
 
 	/*
 	 * If set to true, this will request events the next time the
@@ -230,7 +230,7 @@ struct smi_info {
 	 * call.  Generally used after a panic to make sure stuff goes
 	 * out.
 	 */
-	int                 run_to_completion;
+	bool                run_to_completion;
 
 	/* The I/O port of an SI interface. */
 	int                 port;
@@ -248,19 +248,25 @@ struct smi_info {
 	/* The timer for this si. */
 	struct timer_list   si_timer;
 
+	/* This flag is set, if the timer is running (timer_pending() isn't enough) */
+	bool		    timer_running;
+
 	/* The time (in jiffies) the last timeout occurred at. */
 	unsigned long       last_timeout_jiffies;
 
 	/* Used to gracefully stop the timer without race conditions. */
 	atomic_t            stop_operation;
 
+	/* Are we waiting for the events, pretimeouts, received msgs? */
+	atomic_t            need_watch;
+
 	/*
 	 * The driver will disable interrupts when it gets into a
 	 * situation where it cannot handle messages due to lack of
 	 * memory.  Once that situation clears up, it will re-enable
 	 * interrupts.
 	 */
-	int interrupt_disabled;
+	bool interrupt_disabled;
 
 	/* From the get device id response... */
 	struct ipmi_device_id device_id;
@@ -273,7 +279,7 @@ struct smi_info {
 	 * True if we allocated the device, false if it came from
 	 * someplace else (like PCI).
 	 */
-	int dev_registered;
+	bool dev_registered;
 
 	/* Slave address, could be reported from DMI. */
 	unsigned char slave_addr;
@@ -297,19 +303,19 @@ struct smi_info {
 static int force_kipmid[SI_MAX_PARMS];
 static int num_force_kipmid;
 #ifdef CONFIG_PCI
-static int pci_registered;
+static bool pci_registered;
 #endif
 #ifdef CONFIG_ACPI
-static int pnp_registered;
+static bool pnp_registered;
 #endif
 #ifdef CONFIG_PARISC
-static int parisc_registered;
+static bool parisc_registered;
 #endif
 
 static unsigned int kipmid_max_busy_us[SI_MAX_PARMS];
 static int num_max_busy_us;
 
-static int unload_when_empty = 1;
+static bool unload_when_empty = true;
 
 static int add_smi(struct smi_info *smi);
 static int try_smi_init(struct smi_info *smi);
@@ -434,6 +440,13 @@ static void start_clear_flags(struct smi_info *smi_info)
 	smi_info->si_state = SI_CLEARING_FLAGS;
 }
 
+static void smi_mod_timer(struct smi_info *smi_info, unsigned long new_val)
+{
+	smi_info->last_timeout_jiffies = jiffies;
+	mod_timer(&smi_info->si_timer, new_val);
+	smi_info->timer_running = true;
+}
+
 /*
  * When we have a situtaion where we run out of memory and cannot
  * allocate messages, we just leave them in the BMC and run the system
@@ -444,10 +457,9 @@ static inline void disable_si_irq(struct smi_info *smi_info)
 {
 	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		start_disable_irq(smi_info);
-		smi_info->interrupt_disabled = 1;
+		smi_info->interrupt_disabled = true;
 		if (!atomic_read(&smi_info->stop_operation))
-			mod_timer(&smi_info->si_timer,
-				  jiffies + SI_TIMEOUT_JIFFIES);
+			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
 	}
 }
 
@@ -455,7 +467,7 @@ static inline void enable_si_irq(struct smi_info *smi_info)
 {
 	if ((smi_info->irq) && (smi_info->interrupt_disabled)) {
 		start_enable_irq(smi_info);
-		smi_info->interrupt_disabled = 0;
+		smi_info->interrupt_disabled = false;
 	}
 }
 
@@ -700,7 +712,7 @@ static void handle_transaction_done(struct smi_info *smi_info)
 			dev_warn(smi_info->dev,
 				 "Maybe ok, but ipmi might run very slowly.\n");
 		} else
-			smi_info->interrupt_disabled = 0;
+			smi_info->interrupt_disabled = false;
 		smi_info->si_state = SI_NORMAL;
 		break;
 	}
@@ -853,6 +865,19 @@ static enum si_sm_result smi_event_handler(struct smi_info *smi_info,
 	return si_sm_result;
 }
 
+static void check_start_timer_thread(struct smi_info *smi_info)
+{
+	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
+		smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
+		if (smi_info->thread)
+			wake_up_process(smi_info->thread);
+
+		start_next_msg(smi_info);
+		smi_event_handler(smi_info, 0);
+	}
+}
+
 static void sender(void                *send_info,
 		   struct ipmi_smi_msg *msg,
 		   int                 priority)
@@ -906,27 +931,11 @@ static void sender(void                *send_info,
 	else
 		list_add_tail(&msg->link, &smi_info->xmit_msgs);
 
-	if (smi_info->si_state == SI_NORMAL && smi_info->curr_msg == NULL) {
-		/*
-		 * last_timeout_jiffies is updated here to avoid
-		 * smi_timeout() handler passing very large time_diff
-		 * value to smi_event_handler() that causes
-		 * the send command to abort.
-		 */
-		smi_info->last_timeout_jiffies = jiffies;
-
-		mod_timer(&smi_info->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
-
-		if (smi_info->thread)
-			wake_up_process(smi_info->thread);
-
-		start_next_msg(smi_info);
-		smi_event_handler(smi_info, 0);
-	}
+	check_start_timer_thread(smi_info);
 	spin_unlock_irqrestore(&smi_info->si_lock, flags);
 }
 
-static void set_run_to_completion(void *send_info, int i_run_to_completion)
+static void set_run_to_completion(void *send_info, bool i_run_to_completion)
 {
 	struct smi_info   *smi_info = send_info;
 	enum si_sm_result result;
@@ -1004,6 +1013,17 @@ static int ipmi_thread(void *data)
 
 		spin_lock_irqsave(&(smi_info->si_lock), flags);
 		smi_result = smi_event_handler(smi_info, 0);
+
+		/*
+		 * If the driver is doing something, there is a possible
+		 * race with the timer.  If the timer handler see idle,
+		 * and the thread here sees something else, the timer
+		 * handler won't restart the timer even though it is
+		 * required.  So start it here if necessary.
+		 */
+		if (smi_result != SI_SM_IDLE && !smi_info->timer_running)
+			smi_mod_timer(smi_info, jiffies + SI_TIMEOUT_JIFFIES);
+
 		spin_unlock_irqrestore(&(smi_info->si_lock), flags);
 		busy_wait = ipmi_thread_busy_wait(smi_result, smi_info,
 						  &busy_until);
@@ -1011,9 +1031,15 @@ static int ipmi_thread(void *data)
 			; /* do nothing */
 		else if (smi_result == SI_SM_CALL_WITH_DELAY && busy_wait)
 			schedule();
-		else if (smi_result == SI_SM_IDLE)
-			schedule_timeout_interruptible(100);
-		else
+		else if (smi_result == SI_SM_IDLE) {
+			if (atomic_read(&smi_info->need_watch)) {
+				schedule_timeout_interruptible(100);
+			} else {
+				/* Wait to be woken up when we are needed. */
+				__set_current_state(TASK_INTERRUPTIBLE);
+				schedule();
+			}
+		} else
 			schedule_timeout_interruptible(1);
 	}
 	return 0;
@@ -1024,7 +1050,7 @@ static void poll(void *send_info)
 {
 	struct smi_info *smi_info = send_info;
 	unsigned long flags = 0;
-	int run_to_completion = smi_info->run_to_completion;
+	bool run_to_completion = smi_info->run_to_completion;
 
 	/*
 	 * Make sure there is some delay in the poll loop so we can
@@ -1049,6 +1075,17 @@ static void request_events(void *send_info)
 	atomic_set(&smi_info->req_events, 1);
 }
 
+static void set_need_watch(void *send_info, bool enable)
+{
+	struct smi_info *smi_info = send_info;
+	unsigned long flags;
+
+	atomic_set(&smi_info->need_watch, enable);
+	spin_lock_irqsave(&smi_info->si_lock, flags);
+	check_start_timer_thread(smi_info);
+	spin_unlock_irqrestore(&smi_info->si_lock, flags);
+}
+
 static int initialized;
 
 static void smi_timeout(unsigned long data)
@@ -1073,10 +1110,6 @@ static void smi_timeout(unsigned long data)
 		     * SI_USEC_PER_JIFFY);
 	smi_result = smi_event_handler(smi_info, time_diff);
 
-	spin_unlock_irqrestore(&(smi_info->si_lock), flags);
-
-	smi_info->last_timeout_jiffies = jiffies_now;
-
 	if ((smi_info->irq) && (!smi_info->interrupt_disabled)) {
 		/* Running with interrupts, only do long timeouts. */
 		timeout = jiffies + SI_TIMEOUT_JIFFIES;
@@ -1098,7 +1131,10 @@ static void smi_timeout(unsigned long data)
 
  do_mod_timer:
 	if (smi_result != SI_SM_IDLE)
-		mod_timer(&(smi_info->si_timer), timeout);
+		smi_mod_timer(smi_info, timeout);
+	else
+		smi_info->timer_running = false;
+	spin_unlock_irqrestore(&(smi_info->si_lock), flags);
 }
 
 static irqreturn_t si_irq_handler(int irq, void *data)
@@ -1146,8 +1182,7 @@ static int smi_start_processing(void       *send_info,
 
 	/* Set up the timer that drives the interface. */
 	setup_timer(&new_smi->si_timer, smi_timeout, (long)new_smi);
-	new_smi->last_timeout_jiffies = jiffies;
-	mod_timer(&new_smi->si_timer, jiffies + SI_TIMEOUT_JIFFIES);
+	smi_mod_timer(new_smi, jiffies + SI_TIMEOUT_JIFFIES);
 
 	/*
 	 * Check if the user forcefully enabled the daemon.
@@ -1188,7 +1223,7 @@ static int get_smi_info(void *send_info, struct ipmi_smi_info *data)
 	return 0;
 }
 
-static void set_maintenance_mode(void *send_info, int enable)
+static void set_maintenance_mode(void *send_info, bool enable)
 {
 	struct smi_info   *smi_info = send_info;
 
@@ -1202,6 +1237,7 @@ static struct ipmi_smi_handlers handlers = {
 	.get_smi_info		= get_smi_info,
 	.sender			= sender,
 	.request_events		= request_events,
+	.set_need_watch		= set_need_watch,
 	.set_maintenance_mode   = set_maintenance_mode,
 	.set_run_to_completion  = set_run_to_completion,
 	.poll			= poll,
@@ -1229,7 +1265,7 @@ static bool          si_tryplatform = 1;
 #ifdef CONFIG_PCI
 static bool          si_trypci = 1;
 #endif
-static bool          si_trydefaults = 1;
+static bool          si_trydefaults = IS_ENABLED(CONFIG_IPMI_SI_PROBE_DEFAULTS);
 static char          *si_type[SI_MAX_PARMS];
 #define MAX_SI_TYPE_STR 30
 static char          si_type_str[MAX_SI_TYPE_STR];
@@ -1328,7 +1364,7 @@ module_param_array(force_kipmid, int, &num_force_kipmid, 0);
 MODULE_PARM_DESC(force_kipmid, "Force the kipmi daemon to be enabled (1) or"
 		 " disabled(0).  Normally the IPMI driver auto-detects"
 		 " this, but the value may be overridden by this parm.");
-module_param(unload_when_empty, int, 0);
+module_param(unload_when_empty, bool, 0);
 MODULE_PARM_DESC(unload_when_empty, "Unload the module if no interfaces are"
 		 " specified or found, default is 1.  Setting to 0"
 		 " is useful for hot add of devices using hotmod.");
@@ -3336,18 +3372,19 @@ static int try_smi_init(struct smi_info *new_smi)
 	INIT_LIST_HEAD(&(new_smi->hp_xmit_msgs));
 	new_smi->curr_msg = NULL;
 	atomic_set(&new_smi->req_events, 0);
-	new_smi->run_to_completion = 0;
+	new_smi->run_to_completion = false;
 	for (i = 0; i < SI_NUM_STATS; i++)
 		atomic_set(&new_smi->stats[i], 0);
 
-	new_smi->interrupt_disabled = 1;
+	new_smi->interrupt_disabled = true;
 	atomic_set(&new_smi->stop_operation, 0);
+	atomic_set(&new_smi->need_watch, 0);
 	new_smi->intf_num = smi_num;
 	smi_num++;
 
 	rv = try_enable_event_buffer(new_smi);
 	if (rv == 0)
-		new_smi->has_event_buffer = 1;
+		new_smi->has_event_buffer = true;
 
 	/*
 	 * Start clearing the flags before we enable interrupts or the
@@ -3381,7 +3418,7 @@ static int try_smi_init(struct smi_info *new_smi)
 			       rv);
 			goto out_err;
 		}
-		new_smi->dev_registered = 1;
+		new_smi->dev_registered = true;
 	}
 
 	rv = ipmi_register_smi(&handlers,
@@ -3430,7 +3467,7 @@ static int try_smi_init(struct smi_info *new_smi)
 	wait_for_timer_and_thread(new_smi);
 
  out_err:
-	new_smi->interrupt_disabled = 1;
+	new_smi->interrupt_disabled = true;
 
 	if (new_smi->intf) {
 		ipmi_unregister_smi(new_smi->intf);
@@ -3466,7 +3503,7 @@ static int try_smi_init(struct smi_info *new_smi)
 
 	if (new_smi->dev_registered) {
 		platform_device_unregister(new_smi->pdev);
-		new_smi->dev_registered = 0;
+		new_smi->dev_registered = false;
 	}
 
 	return rv;
@@ -3521,14 +3558,14 @@ static int init_ipmi_si(void)
 			printk(KERN_ERR PFX "Unable to register "
 			       "PCI driver: %d\n", rv);
 		else
-			pci_registered = 1;
+			pci_registered = true;
 	}
 #endif
 
 #ifdef CONFIG_ACPI
 	if (si_tryacpi) {
 		pnp_register_driver(&ipmi_pnp_driver);
-		pnp_registered = 1;
+		pnp_registered = true;
 	}
 #endif
 
@@ -3544,7 +3581,7 @@ static int init_ipmi_si(void)
 
 #ifdef CONFIG_PARISC
 	register_parisc_driver(&ipmi_parisc_driver);
-	parisc_registered = 1;
+	parisc_registered = true;
 	/* poking PC IO addresses will crash machine, don't do it */
 	si_trydefaults = 0;
 #endif

drivers/char/pcmcia/Kconfig

@@ -15,7 +15,7 @@ config SYNCLINK_CS
 
 	  This driver may be built as a module ( = code which can be
 	  inserted in and removed from the running kernel whenever you want).
-	  The module will be called synclinkmp.  If you want to do that, say M
+	  The module will be called synclink_cs.  If you want to do that, say M
 	  here.
 
 config CARDMAN_4000

drivers/char/ttyprintk.c

@@ -17,7 +17,7 @@
 #include <linux/device.h>
 #include <linux/serial.h>
 #include <linux/tty.h>
-#include <linux/export.h>
+#include <linux/module.h>
 
 struct ttyprintk_port {
 	struct tty_port port;
@@ -210,10 +210,19 @@ static int __init ttyprintk_init(void)
 	return 0;
 
 error:
-	tty_unregister_driver(ttyprintk_driver);
 	put_tty_driver(ttyprintk_driver);
 	tty_port_destroy(&tpk_port.port);
-	ttyprintk_driver = NULL;
 	return ret;
 }
+
+static void __exit ttyprintk_exit(void)
+{
+	tty_unregister_driver(ttyprintk_driver);
+	put_tty_driver(ttyprintk_driver);
+	tty_port_destroy(&tpk_port.port);
+}
+
 device_initcall(ttyprintk_init);
+module_exit(ttyprintk_exit);
+
+MODULE_LICENSE("GPL");

drivers/dma/Kconfig

@@ -197,7 +197,7 @@ config AMCC_PPC440SPE_ADMA
 
 config TIMB_DMA
 	tristate "Timberdale FPGA DMA support"
-	depends on MFD_TIMBERDALE || HAS_IOMEM
+	depends on MFD_TIMBERDALE
 	select DMA_ENGINE
 	help
 	  Enable support for the Timberdale FPGA DMA engine.

drivers/dma/edma.c

@@ -182,11 +182,13 @@ static void edma_execute(struct edma_chan *echan)
 				  echan->ecc->dummy_slot);
 	}
 
-	edma_resume(echan->ch_num);
-
 	if (edesc->processed <= MAX_NR_SG) {
 		dev_dbg(dev, "first transfer starting %d\n", echan->ch_num);
 		edma_start(echan->ch_num);
+	} else {
+		dev_dbg(dev, "chan: %d: completed %d elements, resuming\n",
+			echan->ch_num, edesc->processed);
+		edma_resume(echan->ch_num);
 	}
 
 	/*

drivers/dma/fsl-edma.c

@@ -968,7 +968,17 @@ static struct platform_driver fsl_edma_driver = {
 	.remove		= fsl_edma_remove,
 };
 
-module_platform_driver(fsl_edma_driver);
+static int __init fsl_edma_init(void)
+{
+	return platform_driver_register(&fsl_edma_driver);
+}
+subsys_initcall(fsl_edma_init);
+
+static void __exit fsl_edma_exit(void)
+{
+	platform_driver_unregister(&fsl_edma_driver);
+}
+module_exit(fsl_edma_exit);
 
 MODULE_ALIAS("platform:fsl-edma");
 MODULE_DESCRIPTION("Freescale eDMA engine driver");

drivers/dma/sirf-dma.c

@@ -666,7 +666,7 @@ static struct dma_chan *of_dma_sirfsoc_xlate(struct of_phandle_args *dma_spec,
 	struct sirfsoc_dma *sdma = ofdma->of_dma_data;
 	unsigned int request = dma_spec->args[0];
 
-	if (request > SIRFSOC_DMA_CHANNELS)
+	if (request >= SIRFSOC_DMA_CHANNELS)
 		return NULL;
 
 	return dma_get_slave_channel(&sdma->channels[request].chan);

drivers/gpio/gpio-spear-spics.c

@@ -2,7 +2,7 @@
  * SPEAr platform SPI chipselect abstraction over gpiolib
  *
  * Copyright (C) 2012 ST Microelectronics
- * Shiraz Hashim <shiraz.hashim@st.com>
+ * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2. This program is licensed "as is" without any
@@ -205,6 +205,6 @@ static int __init spics_gpio_init(void)
 }
 subsys_initcall(spics_gpio_init);
 
-MODULE_AUTHOR("Shiraz Hashim <shiraz.hashim@st.com>");
+MODULE_AUTHOR("Shiraz Hashim <shiraz.linux.kernel@gmail.com>");
 MODULE_DESCRIPTION("ST Microlectronics SPEAr SPI Chip Select Abstraction");
 MODULE_LICENSE("GPL");

drivers/gpio/gpiolib-acpi.c

@@ -233,7 +233,7 @@ static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
 {
 	struct gpio_chip *chip = acpi_gpio->chip;
 
-	if (!chip->dev || !chip->to_irq)
+	if (!chip->to_irq)
 		return;
 
 	INIT_LIST_HEAD(&acpi_gpio->events);
@@ -253,7 +253,7 @@ static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
 	struct acpi_gpio_event *event, *ep;
 	struct gpio_chip *chip = acpi_gpio->chip;
 
-	if (!chip->dev || !chip->to_irq)
+	if (!chip->to_irq)
 		return;
 
 	list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
@@ -451,7 +451,7 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
 		if (function == ACPI_WRITE)
 			gpiod_set_raw_value(desc, !!((1 << i) & *value));
 		else
-			*value |= gpiod_get_raw_value(desc) << i;
+			*value |= (u64)gpiod_get_raw_value(desc) << i;
 	}
 
 out:
@@ -501,6 +501,9 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
 	acpi_handle handle;
 	acpi_status status;
 
+	if (!chip || !chip->dev)
+		return;
+
 	handle = ACPI_HANDLE(chip->dev);
 	if (!handle)
 		return;
@@ -531,6 +534,9 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
 	acpi_handle handle;
 	acpi_status status;
 
+	if (!chip || !chip->dev)
+		return;
+
 	handle = ACPI_HANDLE(chip->dev);
 	if (!handle)
 		return;

drivers/gpio/gpiolib.c

@@ -1387,8 +1387,8 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq,
 {
 	struct gpio_chip *chip = d->host_data;
 
-	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
 	irq_set_chip_data(irq, chip);
+	irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler);
 #ifdef CONFIG_ARM
 	set_irq_flags(irq, IRQF_VALID);
 #else

drivers/gpu/drm/Makefile

@@ -23,7 +23,7 @@ drm-$(CONFIG_DRM_PANEL) += drm_panel.o
 
 drm-usb-y   := drm_usb.o
 
-drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o
+drm_kms_helper-y := drm_crtc_helper.o drm_dp_helper.o drm_probe_helper.o
 drm_kms_helper-$(CONFIG_DRM_LOAD_EDID_FIRMWARE) += drm_edid_load.o
 drm_kms_helper-$(CONFIG_DRM_KMS_FB_HELPER) += drm_fb_helper.o
 drm_kms_helper-$(CONFIG_DRM_KMS_CMA_HELPER) += drm_fb_cma_helper.o

drivers/gpu/drm/ast/ast_post.c

@@ -572,7 +572,7 @@ static u32 cbr_scan2(struct ast_private *ast)
 		for (loop = 0; loop < CBR_PASSNUM2; loop++) {
 			if ((data = cbr_test2(ast)) != 0) {
 				data2 &= data;
-				if (!data)
+				if (!data2)
 					return 0;
 				break;
 			}

drivers/gpu/drm/bochs/bochs.h

@@ -1,5 +1,6 @@
 #include <linux/io.h>
 #include <linux/fb.h>
+#include <linux/console.h>
 
 #include <drm/drmP.h>
 #include <drm/drm_crtc.h>
@@ -87,8 +88,6 @@ struct bochs_device {
 		struct bochs_framebuffer gfb;
 		struct drm_fb_helper helper;
 		int size;
-		int x1, y1, x2, y2; /* dirty rect */
-		spinlock_t dirty_lock;
 		bool initialized;
 	} fb;
 };

drivers/gpu/drm/bochs/bochs_drv.c

@@ -94,6 +94,49 @@ static struct drm_driver bochs_driver = {
 	.dumb_destroy           = drm_gem_dumb_destroy,
 };
 
+/* ---------------------------------------------------------------------- */
+/* pm interface                                                           */
+
+static int bochs_pm_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct bochs_device *bochs = drm_dev->dev_private;
+
+	drm_kms_helper_poll_disable(drm_dev);
+
+	if (bochs->fb.initialized) {
+		console_lock();
+		fb_set_suspend(bochs->fb.helper.fbdev, 1);
+		console_unlock();
+	}
+
+	return 0;
+}
+
+static int bochs_pm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct bochs_device *bochs = drm_dev->dev_private;
+
+	drm_helper_resume_force_mode(drm_dev);
+
+	if (bochs->fb.initialized) {
+		console_lock();
+		fb_set_suspend(bochs->fb.helper.fbdev, 0);
+		console_unlock();
+	}
+
+	drm_kms_helper_poll_enable(drm_dev);
+	return 0;
+}
+
+static const struct dev_pm_ops bochs_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(bochs_pm_suspend,
+				bochs_pm_resume)
+};
+
 /* ---------------------------------------------------------------------- */
 /* pci interface                                                          */
 
@@ -155,6 +198,7 @@ static struct pci_driver bochs_pci_driver = {
 	.id_table =	bochs_pci_tbl,
 	.probe =	bochs_pci_probe,
 	.remove =	bochs_pci_remove,
+	.driver.pm =    &bochs_pm_ops,
 };
 
 /* ---------------------------------------------------------------------- */

drivers/gpu/drm/bochs/bochs_fbdev.c

@@ -190,7 +190,6 @@ int bochs_fbdev_init(struct bochs_device *bochs)
 	int ret;
 
 	bochs->fb.helper.funcs = &bochs_fb_helper_funcs;
-	spin_lock_init(&bochs->fb.dirty_lock);
 
 	ret = drm_fb_helper_init(bochs->dev, &bochs->fb.helper,
 				 1, 1);

drivers/gpu/drm/cirrus/cirrus_drv.c

@@ -11,6 +11,7 @@
 #include <linux/module.h>
 #include <linux/console.h>
 #include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
 
 #include "cirrus_drv.h"
 
@@ -75,6 +76,41 @@ static void cirrus_pci_remove(struct pci_dev *pdev)
 	drm_put_dev(dev);
 }
 
+static int cirrus_pm_suspend(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct cirrus_device *cdev = drm_dev->dev_private;
+
+	drm_kms_helper_poll_disable(drm_dev);
+
+	if (cdev->mode_info.gfbdev) {
+		console_lock();
+		fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 1);
+		console_unlock();
+	}
+
+	return 0;
+}
+
+static int cirrus_pm_resume(struct device *dev)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct drm_device *drm_dev = pci_get_drvdata(pdev);
+	struct cirrus_device *cdev = drm_dev->dev_private;
+
+	drm_helper_resume_force_mode(drm_dev);
+
+	if (cdev->mode_info.gfbdev) {
+		console_lock();
+		fb_set_suspend(cdev->mode_info.gfbdev->helper.fbdev, 0);
+		console_unlock();
+	}
+
+	drm_kms_helper_poll_enable(drm_dev);
+	return 0;
+}
+
 static const struct file_operations cirrus_driver_fops = {
 	.owner = THIS_MODULE,
 	.open = drm_open,
@@ -103,11 +139,17 @@ static struct drm_driver driver = {
 	.dumb_destroy = drm_gem_dumb_destroy,
 };
 
+static const struct dev_pm_ops cirrus_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(cirrus_pm_suspend,
+				cirrus_pm_resume)
+};
+
 static struct pci_driver cirrus_pci_driver = {
 	.name = DRIVER_NAME,
 	.id_table = pciidlist,
 	.probe = cirrus_pci_probe,
 	.remove = cirrus_pci_remove,
+	.driver.pm = &cirrus_pm_ops,
 };
 
 static int __init cirrus_init(void)

drivers/gpu/drm/cirrus/cirrus_mode.c

@@ -308,6 +308,9 @@ static int cirrus_crtc_mode_set(struct drm_crtc *crtc,
 
 	WREG_HDR(hdr);
 	cirrus_crtc_do_set_base(crtc, old_fb, x, y, 0);
+
+	/* Unblank (needed on S3 resume, vgabios doesn't do it then) */
+	outb(0x20, 0x3c0);
 	return 0;
 }
 

drivers/gpu/drm/drm_crtc_helper.c

@@ -72,147 +72,6 @@ void drm_helper_move_panel_connectors_to_head(struct drm_device *dev)
 }
 EXPORT_SYMBOL(drm_helper_move_panel_connectors_to_head);
 
-static bool drm_kms_helper_poll = true;
-module_param_named(poll, drm_kms_helper_poll, bool, 0600);
-
-static void drm_mode_validate_flag(struct drm_connector *connector,
-				   int flags)
-{
-	struct drm_display_mode *mode;
-
-	if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE |
-		      DRM_MODE_FLAG_3D_MASK))
-		return;
-
-	list_for_each_entry(mode, &connector->modes, head) {
-		if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
-				!(flags & DRM_MODE_FLAG_INTERLACE))
-			mode->status = MODE_NO_INTERLACE;
-		if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
-				!(flags & DRM_MODE_FLAG_DBLSCAN))
-			mode->status = MODE_NO_DBLESCAN;
-		if ((mode->flags & DRM_MODE_FLAG_3D_MASK) &&
-				!(flags & DRM_MODE_FLAG_3D_MASK))
-			mode->status = MODE_NO_STEREO;
-	}
-
-	return;
-}
-
-/**
- * drm_helper_probe_single_connector_modes - get complete set of display modes
- * @connector: connector to probe
- * @maxX: max width for modes
- * @maxY: max height for modes
- *
- * Based on the helper callbacks implemented by @connector try to detect all
- * valid modes.  Modes will first be added to the connector's probed_modes list,
- * then culled (based on validity and the @maxX, @maxY parameters) and put into
- * the normal modes list.
- *
- * Intended to be use as a generic implementation of the ->fill_modes()
- * @connector vfunc for drivers that use the crtc helpers for output mode
- * filtering and detection.
- *
- * Returns:
- * The number of modes found on @connector.
- */
-int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
-					    uint32_t maxX, uint32_t maxY)
-{
-	struct drm_device *dev = connector->dev;
-	struct drm_display_mode *mode;
-	struct drm_connector_helper_funcs *connector_funcs =
-		connector->helper_private;
-	int count = 0;
-	int mode_flags = 0;
-	bool verbose_prune = true;
-
-	WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
-
-	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
-			drm_get_connector_name(connector));
-	/* set all modes to the unverified state */
-	list_for_each_entry(mode, &connector->modes, head)
-		mode->status = MODE_UNVERIFIED;
-
-	if (connector->force) {
-		if (connector->force == DRM_FORCE_ON)
-			connector->status = connector_status_connected;
-		else
-			connector->status = connector_status_disconnected;
-		if (connector->funcs->force)
-			connector->funcs->force(connector);
-	} else {
-		connector->status = connector->funcs->detect(connector, true);
-	}
-
-	/* Re-enable polling in case the global poll config changed. */
-	if (drm_kms_helper_poll != dev->mode_config.poll_running)
-		drm_kms_helper_poll_enable(dev);
-
-	dev->mode_config.poll_running = drm_kms_helper_poll;
-
-	if (connector->status == connector_status_disconnected) {
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
-			connector->base.id, drm_get_connector_name(connector));
-		drm_mode_connector_update_edid_property(connector, NULL);
-		verbose_prune = false;
-		goto prune;
-	}
-
-#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
-	count = drm_load_edid_firmware(connector);
-	if (count == 0)
-#endif
-		count = (*connector_funcs->get_modes)(connector);
-
-	if (count == 0 && connector->status == connector_status_connected)
-		count = drm_add_modes_noedid(connector, 1024, 768);
-	if (count == 0)
-		goto prune;
-
-	drm_mode_connector_list_update(connector);
-
-	if (maxX && maxY)
-		drm_mode_validate_size(dev, &connector->modes, maxX, maxY);
-
-	if (connector->interlace_allowed)
-		mode_flags |= DRM_MODE_FLAG_INTERLACE;
-	if (connector->doublescan_allowed)
-		mode_flags |= DRM_MODE_FLAG_DBLSCAN;
-	if (connector->stereo_allowed)
-		mode_flags |= DRM_MODE_FLAG_3D_MASK;
-	drm_mode_validate_flag(connector, mode_flags);
-
-	list_for_each_entry(mode, &connector->modes, head) {
-		if (mode->status == MODE_OK)
-			mode->status = connector_funcs->mode_valid(connector,
-								   mode);
-	}
-
-prune:
-	drm_mode_prune_invalid(dev, &connector->modes, verbose_prune);
-
-	if (list_empty(&connector->modes))
-		return 0;
-
-	list_for_each_entry(mode, &connector->modes, head)
-		mode->vrefresh = drm_mode_vrefresh(mode);
-
-	drm_mode_sort(&connector->modes);
-
-	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
-			drm_get_connector_name(connector));
-	list_for_each_entry(mode, &connector->modes, head) {
-		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
-		drm_mode_debug_printmodeline(mode);
-	}
-
-	return count;
-}
-EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
-
 /**
  * drm_helper_encoder_in_use - check if a given encoder is in use
  * @encoder: encoder to check
@@ -1020,232 +879,3 @@ void drm_helper_resume_force_mode(struct drm_device *dev)
 	drm_modeset_unlock_all(dev);
 }
 EXPORT_SYMBOL(drm_helper_resume_force_mode);
-
-/**
- * drm_kms_helper_hotplug_event - fire off KMS hotplug events
- * @dev: drm_device whose connector state changed
- *
- * This function fires off the uevent for userspace and also calls the
- * output_poll_changed function, which is most commonly used to inform the fbdev
- * emulation code and allow it to update the fbcon output configuration.
- *
- * Drivers should call this from their hotplug handling code when a change is
- * detected. Note that this function does not do any output detection of its
- * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the
- * driver already.
- *
- * This function must be called from process context with no mode
- * setting locks held.
- */
-void drm_kms_helper_hotplug_event(struct drm_device *dev)
-{
-	/* send a uevent + call fbdev */
-	drm_sysfs_hotplug_event(dev);
-	if (dev->mode_config.funcs->output_poll_changed)
-		dev->mode_config.funcs->output_poll_changed(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_hotplug_event);
-
-#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
-static void output_poll_execute(struct work_struct *work)
-{
-	struct delayed_work *delayed_work = to_delayed_work(work);
-	struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
-	struct drm_connector *connector;
-	enum drm_connector_status old_status;
-	bool repoll = false, changed = false;
-
-	if (!drm_kms_helper_poll)
-		return;
-
-	mutex_lock(&dev->mode_config.mutex);
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-
-		/* Ignore forced connectors. */
-		if (connector->force)
-			continue;
-
-		/* Ignore HPD capable connectors and connectors where we don't
-		 * want any hotplug detection at all for polling. */
-		if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)
-			continue;
-
-		repoll = true;
-
-		old_status = connector->status;
-		/* if we are connected and don't want to poll for disconnect
-		   skip it */
-		if (old_status == connector_status_connected &&
-		    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))
-			continue;
-
-		connector->status = connector->funcs->detect(connector, false);
-		if (old_status != connector->status) {
-			const char *old, *new;
-
-			old = drm_get_connector_status_name(old_status);
-			new = drm_get_connector_status_name(connector->status);
-
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
-				      "status updated from %s to %s\n",
-				      connector->base.id,
-				      drm_get_connector_name(connector),
-				      old, new);
-
-			changed = true;
-		}
-	}
-
-	mutex_unlock(&dev->mode_config.mutex);
-
-	if (changed)
-		drm_kms_helper_hotplug_event(dev);
-
-	if (repoll)
-		schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
-}
-
-/**
- * drm_kms_helper_poll_disable - disable output polling
- * @dev: drm_device
- *
- * This function disables the output polling work.
- *
- * Drivers can call this helper from their device suspend implementation. It is
- * not an error to call this even when output polling isn't enabled or arlready
- * disabled.
- */
-void drm_kms_helper_poll_disable(struct drm_device *dev)
-{
-	if (!dev->mode_config.poll_enabled)
-		return;
-	cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_disable);
-
-/**
- * drm_kms_helper_poll_enable - re-enable output polling.
- * @dev: drm_device
- *
- * This function re-enables the output polling work.
- *
- * Drivers can call this helper from their device resume implementation. It is
- * an error to call this when the output polling support has not yet been set
- * up.
- */
-void drm_kms_helper_poll_enable(struct drm_device *dev)
-{
-	bool poll = false;
-	struct drm_connector *connector;
-
-	if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
-		return;
-
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-		if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
-					 DRM_CONNECTOR_POLL_DISCONNECT))
-			poll = true;
-	}
-
-	if (poll)
-		schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_enable);
-
-/**
- * drm_kms_helper_poll_init - initialize and enable output polling
- * @dev: drm_device
- *
- * This function intializes and then also enables output polling support for
- * @dev. Drivers which do not have reliable hotplug support in hardware can use
- * this helper infrastructure to regularly poll such connectors for changes in
- * their connection state.
- *
- * Drivers can control which connectors are polled by setting the
- * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On
- * connectors where probing live outputs can result in visual distortion drivers
- * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this.
- * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are
- * completely ignored by the polling logic.
- *
- * Note that a connector can be both polled and probed from the hotplug handler,
- * in case the hotplug interrupt is known to be unreliable.
- */
-void drm_kms_helper_poll_init(struct drm_device *dev)
-{
-	INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
-	dev->mode_config.poll_enabled = true;
-
-	drm_kms_helper_poll_enable(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_init);
-
-/**
- * drm_kms_helper_poll_fini - disable output polling and clean it up
- * @dev: drm_device
- */
-void drm_kms_helper_poll_fini(struct drm_device *dev)
-{
-	drm_kms_helper_poll_disable(dev);
-}
-EXPORT_SYMBOL(drm_kms_helper_poll_fini);
-
-/**
- * drm_helper_hpd_irq_event - hotplug processing
- * @dev: drm_device
- *
- * Drivers can use this helper function to run a detect cycle on all connectors
- * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All
- * other connectors are ignored, which is useful to avoid reprobing fixed
- * panels.
- *
- * This helper function is useful for drivers which can't or don't track hotplug
- * interrupts for each connector.
- *
- * Drivers which support hotplug interrupts for each connector individually and
- * which have a more fine-grained detect logic should bypass this code and
- * directly call drm_kms_helper_hotplug_event() in case the connector state
- * changed.
- *
- * This function must be called from process context with no mode
- * setting locks held.
- *
- * Note that a connector can be both polled and probed from the hotplug handler,
- * in case the hotplug interrupt is known to be unreliable.
- */
-bool drm_helper_hpd_irq_event(struct drm_device *dev)
-{
-	struct drm_connector *connector;
-	enum drm_connector_status old_status;
-	bool changed = false;
-
-	if (!dev->mode_config.poll_enabled)
-		return false;
-
-	mutex_lock(&dev->mode_config.mutex);
-	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
-
-		/* Only handle HPD capable connectors. */
-		if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
-			continue;
-
-		old_status = connector->status;
-
-		connector->status = connector->funcs->detect(connector, false);
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
-			      connector->base.id,
-			      drm_get_connector_name(connector),
-			      drm_get_connector_status_name(old_status),
-			      drm_get_connector_status_name(connector->status));
-		if (old_status != connector->status)
-			changed = true;
-	}
-
-	mutex_unlock(&dev->mode_config.mutex);
-
-	if (changed)
-		drm_kms_helper_hotplug_event(dev);
-
-	return changed;
-}
-EXPORT_SYMBOL(drm_helper_hpd_irq_event);

drivers/gpu/drm/drm_dp_helper.c

@@ -577,7 +577,9 @@ static u32 drm_dp_i2c_functionality(struct i2c_adapter *adapter)
 
 /*
  * Transfer a single I2C-over-AUX message and handle various error conditions,
- * retrying the transaction as appropriate.
+ * retrying the transaction as appropriate.  It is assumed that the
+ * aux->transfer function does not modify anything in the msg other than the
+ * reply field.
  */
 static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 {
@@ -665,11 +667,26 @@ static int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
 {
 	struct drm_dp_aux *aux = adapter->algo_data;
 	unsigned int i, j;
+	struct drm_dp_aux_msg msg;
+	int err = 0;
 
-	for (i = 0; i < num; i++) {
-		struct drm_dp_aux_msg msg;
-		int err;
+	memset(&msg, 0, sizeof(msg));
 
+	for (i = 0; i < num; i++) {
+		msg.address = msgs[i].addr;
+		msg.request = (msgs[i].flags & I2C_M_RD) ?
+			DP_AUX_I2C_READ :
+			DP_AUX_I2C_WRITE;
+		msg.request |= DP_AUX_I2C_MOT;
+		/* Send a bare address packet to start the transaction.
+		 * Zero sized messages specify an address only (bare
+		 * address) transaction.
+		 */
+		msg.buffer = NULL;
+		msg.size = 0;
+		err = drm_dp_i2c_do_msg(aux, &msg);
+		if (err < 0)
+			break;
 		/*
 		 * Many hardware implementations support FIFOs larger than a
 		 * single byte, but it has been empirically determined that
@@ -678,30 +695,28 @@ static int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
 		 * transferred byte-by-byte.
 		 */
 		for (j = 0; j < msgs[i].len; j++) {
-			memset(&msg, 0, sizeof(msg));
-			msg.address = msgs[i].addr;
-
-			msg.request = (msgs[i].flags & I2C_M_RD) ?
-					DP_AUX_I2C_READ :
-					DP_AUX_I2C_WRITE;
-
-			/*
-			 * All messages except the last one are middle-of-
-			 * transfer messages.
-			 */
-			if ((i < num - 1) || (j < msgs[i].len - 1))
-				msg.request |= DP_AUX_I2C_MOT;
-
 			msg.buffer = msgs[i].buf + j;
 			msg.size = 1;
 
 			err = drm_dp_i2c_do_msg(aux, &msg);
 			if (err < 0)
-				return err;
+				break;
 		}
+		if (err < 0)
+			break;
 	}
+	if (err >= 0)
+		err = num;
+	/* Send a bare address packet to close out the transaction.
+	 * Zero sized messages specify an address only (bare
+	 * address) transaction.
+	 */
+	msg.request &= ~DP_AUX_I2C_MOT;
+	msg.buffer = NULL;
+	msg.size = 0;
+	(void)drm_dp_i2c_do_msg(aux, &msg);
 
-	return num;
+	return err;
 }
 
 static const struct i2c_algorithm drm_dp_i2c_algo = {

drivers/gpu/drm/drm_mm.c

@@ -207,8 +207,6 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node)
 		return 0;
 	}
 
-	WARN(1, "no hole found for node 0x%lx + 0x%lx\n",
-	     node->start, node->size);
 	return -ENOSPC;
 }
 EXPORT_SYMBOL(drm_mm_reserve_node);

drivers/gpu/drm/drm_plane_helper.c

@@ -203,9 +203,9 @@ EXPORT_SYMBOL(drm_primary_helper_update);
  *
  * Provides a default plane disable handler for primary planes.  This is handler
  * is called in response to a userspace SetPlane operation on the plane with a
- * NULL framebuffer parameter.  We call the driver's modeset handler with a NULL
- * framebuffer to disable the CRTC if no other planes are currently enabled.
- * If other planes are still enabled on the same CRTC, we return -EBUSY.
+ * NULL framebuffer parameter.  It unconditionally fails the disable call with
+ * -EINVAL the only way to disable the primary plane without driver support is
+ * to disable the entier CRTC. Which does not match the plane ->disable hook.
  *
  * Note that some hardware may be able to disable the primary plane without
  * disabling the whole CRTC.  Drivers for such hardware should provide their
@@ -214,34 +214,11 @@ EXPORT_SYMBOL(drm_primary_helper_update);
  * disabled primary plane).
  *
  * RETURNS:
- * Zero on success, error code on failure
+ * Unconditionally returns -EINVAL.
  */
 int drm_primary_helper_disable(struct drm_plane *plane)
 {
-	struct drm_plane *p;
-	struct drm_mode_set set = {
-		.crtc = plane->crtc,
-		.fb = NULL,
-	};
-
-	if (plane->crtc == NULL || plane->fb == NULL)
-		/* Already disabled */
-		return 0;
-
-	list_for_each_entry(p, &plane->dev->mode_config.plane_list, head)
-		if (p != plane && p->fb) {
-			DRM_DEBUG_KMS("Cannot disable primary plane while other planes are still active on CRTC.\n");
-			return -EBUSY;
-		}
-
-	/*
-	 * N.B.  We call set_config() directly here rather than
-	 * drm_mode_set_config_internal() since drm_mode_setplane() already
-	 * handles the basic refcounting and we don't need the special
-	 * cross-CRTC refcounting (no chance of stealing connectors from
-	 * other CRTC's with this update).
-	 */
-	return plane->crtc->funcs->set_config(&set);
+	return -EINVAL;
 }
 EXPORT_SYMBOL(drm_primary_helper_disable);
 

drivers/gpu/drm/drm_probe_helper.c

@@ -0,0 +1,426 @@
+/*
+ * Copyright (c) 2006-2008 Intel Corporation
+ * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
+ *
+ * DRM core CRTC related functions
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ *
+ * Authors:
+ *      Keith Packard
+ *	Eric Anholt <eric@anholt.net>
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ */
+
+#include <linux/export.h>
+#include <linux/moduleparam.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_edid.h>
+
+/**
+ * DOC: output probing helper overview
+ *
+ * This library provides some helper code for output probing. It provides an
+ * implementation of the core connector->fill_modes interface with
+ * drm_helper_probe_single_connector_modes.
+ *
+ * It also provides support for polling connectors with a work item and for
+ * generic hotplug interrupt handling where the driver doesn't or cannot keep
+ * track of a per-connector hpd interrupt.
+ *
+ * This helper library can be used independently of the modeset helper library.
+ * Drivers can also overwrite different parts e.g. use their own hotplug
+ * handling code to avoid probing unrelated outputs.
+ */
+
+static bool drm_kms_helper_poll = true;
+module_param_named(poll, drm_kms_helper_poll, bool, 0600);
+
+static void drm_mode_validate_flag(struct drm_connector *connector,
+				   int flags)
+{
+	struct drm_display_mode *mode;
+
+	if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE |
+		      DRM_MODE_FLAG_3D_MASK))
+		return;
+
+	list_for_each_entry(mode, &connector->modes, head) {
+		if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
+				!(flags & DRM_MODE_FLAG_INTERLACE))
+			mode->status = MODE_NO_INTERLACE;
+		if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
+				!(flags & DRM_MODE_FLAG_DBLSCAN))
+			mode->status = MODE_NO_DBLESCAN;
+		if ((mode->flags & DRM_MODE_FLAG_3D_MASK) &&
+				!(flags & DRM_MODE_FLAG_3D_MASK))
+			mode->status = MODE_NO_STEREO;
+	}
+
+	return;
+}
+
+/**
+ * drm_helper_probe_single_connector_modes - get complete set of display modes
+ * @connector: connector to probe
+ * @maxX: max width for modes
+ * @maxY: max height for modes
+ *
+ * Based on the helper callbacks implemented by @connector try to detect all
+ * valid modes.  Modes will first be added to the connector's probed_modes list,
+ * then culled (based on validity and the @maxX, @maxY parameters) and put into
+ * the normal modes list.
+ *
+ * Intended to be use as a generic implementation of the ->fill_modes()
+ * @connector vfunc for drivers that use the crtc helpers for output mode
+ * filtering and detection.
+ *
+ * Returns:
+ * The number of modes found on @connector.
+ */
+int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
+					    uint32_t maxX, uint32_t maxY)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_display_mode *mode;
+	struct drm_connector_helper_funcs *connector_funcs =
+		connector->helper_private;
+	int count = 0;
+	int mode_flags = 0;
+	bool verbose_prune = true;
+
+	WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
+			drm_get_connector_name(connector));
+	/* set all modes to the unverified state */
+	list_for_each_entry(mode, &connector->modes, head)
+		mode->status = MODE_UNVERIFIED;
+
+	if (connector->force) {
+		if (connector->force == DRM_FORCE_ON)
+			connector->status = connector_status_connected;
+		else
+			connector->status = connector_status_disconnected;
+		if (connector->funcs->force)
+			connector->funcs->force(connector);
+	} else {
+		connector->status = connector->funcs->detect(connector, true);
+	}
+
+	/* Re-enable polling in case the global poll config changed. */
+	if (drm_kms_helper_poll != dev->mode_config.poll_running)
+		drm_kms_helper_poll_enable(dev);
+
+	dev->mode_config.poll_running = drm_kms_helper_poll;
+
+	if (connector->status == connector_status_disconnected) {
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
+			connector->base.id, drm_get_connector_name(connector));
+		drm_mode_connector_update_edid_property(connector, NULL);
+		verbose_prune = false;
+		goto prune;
+	}
+
+#ifdef CONFIG_DRM_LOAD_EDID_FIRMWARE
+	count = drm_load_edid_firmware(connector);
+	if (count == 0)
+#endif
+		count = (*connector_funcs->get_modes)(connector);
+
+	if (count == 0 && connector->status == connector_status_connected)
+		count = drm_add_modes_noedid(connector, 1024, 768);
+	if (count == 0)
+		goto prune;
+
+	drm_mode_connector_list_update(connector);
+
+	if (maxX && maxY)
+		drm_mode_validate_size(dev, &connector->modes, maxX, maxY);
+
+	if (connector->interlace_allowed)
+		mode_flags |= DRM_MODE_FLAG_INTERLACE;
+	if (connector->doublescan_allowed)
+		mode_flags |= DRM_MODE_FLAG_DBLSCAN;
+	if (connector->stereo_allowed)
+		mode_flags |= DRM_MODE_FLAG_3D_MASK;
+	drm_mode_validate_flag(connector, mode_flags);
+
+	list_for_each_entry(mode, &connector->modes, head) {
+		if (mode->status == MODE_OK)
+			mode->status = connector_funcs->mode_valid(connector,
+								   mode);
+	}
+
+prune:
+	drm_mode_prune_invalid(dev, &connector->modes, verbose_prune);
+
+	if (list_empty(&connector->modes))
+		return 0;
+
+	list_for_each_entry(mode, &connector->modes, head)
+		mode->vrefresh = drm_mode_vrefresh(mode);
+
+	drm_mode_sort(&connector->modes);
+
+	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] probed modes :\n", connector->base.id,
+			drm_get_connector_name(connector));
+	list_for_each_entry(mode, &connector->modes, head) {
+		drm_mode_set_crtcinfo(mode, CRTC_INTERLACE_HALVE_V);
+		drm_mode_debug_printmodeline(mode);
+	}
+
+	return count;
+}
+EXPORT_SYMBOL(drm_helper_probe_single_connector_modes);
+
+/**
+ * drm_kms_helper_hotplug_event - fire off KMS hotplug events
+ * @dev: drm_device whose connector state changed
+ *
+ * This function fires off the uevent for userspace and also calls the
+ * output_poll_changed function, which is most commonly used to inform the fbdev
+ * emulation code and allow it to update the fbcon output configuration.
+ *
+ * Drivers should call this from their hotplug handling code when a change is
+ * detected. Note that this function does not do any output detection of its
+ * own, like drm_helper_hpd_irq_event() does - this is assumed to be done by the
+ * driver already.
+ *
+ * This function must be called from process context with no mode
+ * setting locks held.
+ */
+void drm_kms_helper_hotplug_event(struct drm_device *dev)
+{
+	/* send a uevent + call fbdev */
+	drm_sysfs_hotplug_event(dev);
+	if (dev->mode_config.funcs->output_poll_changed)
+		dev->mode_config.funcs->output_poll_changed(dev);
+}
+EXPORT_SYMBOL(drm_kms_helper_hotplug_event);
+
+#define DRM_OUTPUT_POLL_PERIOD (10*HZ)
+static void output_poll_execute(struct work_struct *work)
+{
+	struct delayed_work *delayed_work = to_delayed_work(work);
+	struct drm_device *dev = container_of(delayed_work, struct drm_device, mode_config.output_poll_work);
+	struct drm_connector *connector;
+	enum drm_connector_status old_status;
+	bool repoll = false, changed = false;
+
+	if (!drm_kms_helper_poll)
+		return;
+
+	mutex_lock(&dev->mode_config.mutex);
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+
+		/* Ignore forced connectors. */
+		if (connector->force)
+			continue;
+
+		/* Ignore HPD capable connectors and connectors where we don't
+		 * want any hotplug detection at all for polling. */
+		if (!connector->polled || connector->polled == DRM_CONNECTOR_POLL_HPD)
+			continue;
+
+		repoll = true;
+
+		old_status = connector->status;
+		/* if we are connected and don't want to poll for disconnect
+		   skip it */
+		if (old_status == connector_status_connected &&
+		    !(connector->polled & DRM_CONNECTOR_POLL_DISCONNECT))
+			continue;
+
+		connector->status = connector->funcs->detect(connector, false);
+		if (old_status != connector->status) {
+			const char *old, *new;
+
+			old = drm_get_connector_status_name(old_status);
+			new = drm_get_connector_status_name(connector->status);
+
+			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
+				      "status updated from %s to %s\n",
+				      connector->base.id,
+				      drm_get_connector_name(connector),
+				      old, new);
+
+			changed = true;
+		}
+	}
+
+	mutex_unlock(&dev->mode_config.mutex);
+
+	if (changed)
+		drm_kms_helper_hotplug_event(dev);
+
+	if (repoll)
+		schedule_delayed_work(delayed_work, DRM_OUTPUT_POLL_PERIOD);
+}
+
+/**
+ * drm_kms_helper_poll_disable - disable output polling
+ * @dev: drm_device
+ *
+ * This function disables the output polling work.
+ *
+ * Drivers can call this helper from their device suspend implementation. It is
+ * not an error to call this even when output polling isn't enabled or arlready
+ * disabled.
+ */
+void drm_kms_helper_poll_disable(struct drm_device *dev)
+{
+	if (!dev->mode_config.poll_enabled)
+		return;
+	cancel_delayed_work_sync(&dev->mode_config.output_poll_work);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_disable);
+
+/**
+ * drm_kms_helper_poll_enable - re-enable output polling.
+ * @dev: drm_device
+ *
+ * This function re-enables the output polling work.
+ *
+ * Drivers can call this helper from their device resume implementation. It is
+ * an error to call this when the output polling support has not yet been set
+ * up.
+ */
+void drm_kms_helper_poll_enable(struct drm_device *dev)
+{
+	bool poll = false;
+	struct drm_connector *connector;
+
+	if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll)
+		return;
+
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		if (connector->polled & (DRM_CONNECTOR_POLL_CONNECT |
+					 DRM_CONNECTOR_POLL_DISCONNECT))
+			poll = true;
+	}
+
+	if (poll)
+		schedule_delayed_work(&dev->mode_config.output_poll_work, DRM_OUTPUT_POLL_PERIOD);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_enable);
+
+/**
+ * drm_kms_helper_poll_init - initialize and enable output polling
+ * @dev: drm_device
+ *
+ * This function intializes and then also enables output polling support for
+ * @dev. Drivers which do not have reliable hotplug support in hardware can use
+ * this helper infrastructure to regularly poll such connectors for changes in
+ * their connection state.
+ *
+ * Drivers can control which connectors are polled by setting the
+ * DRM_CONNECTOR_POLL_CONNECT and DRM_CONNECTOR_POLL_DISCONNECT flags. On
+ * connectors where probing live outputs can result in visual distortion drivers
+ * should not set the DRM_CONNECTOR_POLL_DISCONNECT flag to avoid this.
+ * Connectors which have no flag or only DRM_CONNECTOR_POLL_HPD set are
+ * completely ignored by the polling logic.
+ *
+ * Note that a connector can be both polled and probed from the hotplug handler,
+ * in case the hotplug interrupt is known to be unreliable.
+ */
+void drm_kms_helper_poll_init(struct drm_device *dev)
+{
+	INIT_DELAYED_WORK(&dev->mode_config.output_poll_work, output_poll_execute);
+	dev->mode_config.poll_enabled = true;
+
+	drm_kms_helper_poll_enable(dev);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_init);
+
+/**
+ * drm_kms_helper_poll_fini - disable output polling and clean it up
+ * @dev: drm_device
+ */
+void drm_kms_helper_poll_fini(struct drm_device *dev)
+{
+	drm_kms_helper_poll_disable(dev);
+}
+EXPORT_SYMBOL(drm_kms_helper_poll_fini);
+
+/**
+ * drm_helper_hpd_irq_event - hotplug processing
+ * @dev: drm_device
+ *
+ * Drivers can use this helper function to run a detect cycle on all connectors
+ * which have the DRM_CONNECTOR_POLL_HPD flag set in their &polled member. All
+ * other connectors are ignored, which is useful to avoid reprobing fixed
+ * panels.
+ *
+ * This helper function is useful for drivers which can't or don't track hotplug
+ * interrupts for each connector.
+ *
+ * Drivers which support hotplug interrupts for each connector individually and
+ * which have a more fine-grained detect logic should bypass this code and
+ * directly call drm_kms_helper_hotplug_event() in case the connector state
+ * changed.
+ *
+ * This function must be called from process context with no mode
+ * setting locks held.
+ *
+ * Note that a connector can be both polled and probed from the hotplug handler,
+ * in case the hotplug interrupt is known to be unreliable.
+ */
+bool drm_helper_hpd_irq_event(struct drm_device *dev)
+{
+	struct drm_connector *connector;
+	enum drm_connector_status old_status;
+	bool changed = false;
+
+	if (!dev->mode_config.poll_enabled)
+		return false;
+
+	mutex_lock(&dev->mode_config.mutex);
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+
+		/* Only handle HPD capable connectors. */
+		if (!(connector->polled & DRM_CONNECTOR_POLL_HPD))
+			continue;
+
+		old_status = connector->status;
+
+		connector->status = connector->funcs->detect(connector, false);
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
+			      connector->base.id,
+			      drm_get_connector_name(connector),
+			      drm_get_connector_status_name(old_status),
+			      drm_get_connector_status_name(connector->status));
+		if (old_status != connector->status)
+			changed = true;
+	}
+
+	mutex_unlock(&dev->mode_config.mutex);
+
+	if (changed)
+		drm_kms_helper_hotplug_event(dev);
+
+	return changed;
+}
+EXPORT_SYMBOL(drm_helper_hpd_irq_event);

drivers/gpu/drm/i915/i915_drv.h

@@ -1308,6 +1308,7 @@ struct intel_vbt_data {
 
 	struct {
 		u16 pwm_freq_hz;
+		bool present;
 		bool active_low_pwm;
 	} backlight;
 
@@ -2431,20 +2432,18 @@ int i915_gem_context_open(struct drm_device *dev, struct drm_file *file);
 int i915_gem_context_enable(struct drm_i915_private *dev_priv);
 void i915_gem_context_close(struct drm_device *dev, struct drm_file *file);
 int i915_switch_context(struct intel_ring_buffer *ring,
-			struct drm_file *file, struct i915_hw_context *to);
+			struct i915_hw_context *to);
 struct i915_hw_context *
 i915_gem_context_get(struct drm_i915_file_private *file_priv, u32 id);
 void i915_gem_context_free(struct kref *ctx_ref);
 static inline void i915_gem_context_reference(struct i915_hw_context *ctx)
 {
-	if (ctx->obj && HAS_HW_CONTEXTS(ctx->obj->base.dev))
-		kref_get(&ctx->ref);
+	kref_get(&ctx->ref);
 }
 
 static inline void i915_gem_context_unreference(struct i915_hw_context *ctx)
 {
-	if (ctx->obj && HAS_HW_CONTEXTS(ctx->obj->base.dev))
-		kref_put(&ctx->ref, i915_gem_context_free);
+	kref_put(&ctx->ref, i915_gem_context_free);
 }
 
 static inline bool i915_gem_context_is_default(const struct i915_hw_context *c)

drivers/gpu/drm/i915/i915_gem.c

@@ -2790,7 +2790,7 @@ int i915_gpu_idle(struct drm_device *dev)
 
 	/* Flush everything onto the inactive list. */
 	for_each_ring(ring, dev_priv, i) {
-		ret = i915_switch_context(ring, NULL, ring->default_context);
+		ret = i915_switch_context(ring, ring->default_context);
 		if (ret)
 			return ret;
 

drivers/gpu/drm/i915/i915_gem_context.c

@@ -96,9 +96,6 @@
 #define GEN6_CONTEXT_ALIGN (64<<10)
 #define GEN7_CONTEXT_ALIGN 4096
 
-static int do_switch(struct intel_ring_buffer *ring,
-		     struct i915_hw_context *to);
-
 static void do_ppgtt_cleanup(struct i915_hw_ppgtt *ppgtt)
 {
 	struct drm_device *dev = ppgtt->base.dev;
@@ -185,13 +182,15 @@ void i915_gem_context_free(struct kref *ctx_ref)
 						   typeof(*ctx), ref);
 	struct i915_hw_ppgtt *ppgtt = NULL;
 
-	/* We refcount even the aliasing PPGTT to keep the code symmetric */
-	if (USES_PPGTT(ctx->obj->base.dev))
-		ppgtt = ctx_to_ppgtt(ctx);
+	if (ctx->obj) {
+		/* We refcount even the aliasing PPGTT to keep the code symmetric */
+		if (USES_PPGTT(ctx->obj->base.dev))
+			ppgtt = ctx_to_ppgtt(ctx);
 
-	/* XXX: Free up the object before tearing down the address space, in
-	 * case we're bound in the PPGTT */
-	drm_gem_object_unreference(&ctx->obj->base);
+		/* XXX: Free up the object before tearing down the address space, in
+		 * case we're bound in the PPGTT */
+		drm_gem_object_unreference(&ctx->obj->base);
+	}
 
 	if (ppgtt)
 		kref_put(&ppgtt->ref, ppgtt_release);
@@ -232,32 +231,32 @@ __create_hw_context(struct drm_device *dev,
 		return ERR_PTR(-ENOMEM);
 
 	kref_init(&ctx->ref);
-	ctx->obj = i915_gem_alloc_object(dev, dev_priv->hw_context_size);
-	INIT_LIST_HEAD(&ctx->link);
-	if (ctx->obj == NULL) {
-		kfree(ctx);
-		DRM_DEBUG_DRIVER("Context object allocated failed\n");
-		return ERR_PTR(-ENOMEM);
-	}
+	list_add_tail(&ctx->link, &dev_priv->context_list);
 
-	if (INTEL_INFO(dev)->gen >= 7) {
-		ret = i915_gem_object_set_cache_level(ctx->obj,
-						      I915_CACHE_L3_LLC);
-		/* Failure shouldn't ever happen this early */
-		if (WARN_ON(ret))
+	if (dev_priv->hw_context_size) {
+		ctx->obj = i915_gem_alloc_object(dev, dev_priv->hw_context_size);
+		if (ctx->obj == NULL) {
+			ret = -ENOMEM;
 			goto err_out;
-	}
+		}
 
-	list_add_tail(&ctx->link, &dev_priv->context_list);
+		if (INTEL_INFO(dev)->gen >= 7) {
+			ret = i915_gem_object_set_cache_level(ctx->obj,
+							      I915_CACHE_L3_LLC);
+			/* Failure shouldn't ever happen this early */
+			if (WARN_ON(ret))
+				goto err_out;
+		}
+	}
 
 	/* Default context will never have a file_priv */
-	if (file_priv == NULL)
-		return ctx;
-
-	ret = idr_alloc(&file_priv->context_idr, ctx, DEFAULT_CONTEXT_ID, 0,
-			GFP_KERNEL);
-	if (ret < 0)
-		goto err_out;
+	if (file_priv != NULL) {
+		ret = idr_alloc(&file_priv->context_idr, ctx,
+				DEFAULT_CONTEXT_ID, 0, GFP_KERNEL);
+		if (ret < 0)
+			goto err_out;
+	} else
+		ret = DEFAULT_CONTEXT_ID;
 
 	ctx->file_priv = file_priv;
 	ctx->id = ret;
@@ -294,7 +293,7 @@ i915_gem_create_context(struct drm_device *dev,
 	if (IS_ERR(ctx))
 		return ctx;
 
-	if (is_global_default_ctx) {
+	if (is_global_default_ctx && ctx->obj) {
 		/* We may need to do things with the shrinker which
 		 * require us to immediately switch back to the default
 		 * context. This can cause a problem as pinning the
@@ -342,7 +341,7 @@ i915_gem_create_context(struct drm_device *dev,
 	return ctx;
 
 err_unpin:
-	if (is_global_default_ctx)
+	if (is_global_default_ctx && ctx->obj)
 		i915_gem_object_ggtt_unpin(ctx->obj);
 err_destroy:
 	i915_gem_context_unreference(ctx);
@@ -352,32 +351,22 @@ err_destroy:
 void i915_gem_context_reset(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_ring_buffer *ring;
 	int i;
 
-	if (!HAS_HW_CONTEXTS(dev))
-		return;
-
 	/* Prevent the hardware from restoring the last context (which hung) on
 	 * the next switch */
 	for (i = 0; i < I915_NUM_RINGS; i++) {
-		struct i915_hw_context *dctx;
-		if (!(INTEL_INFO(dev)->ring_mask & (1<<i)))
-			continue;
+		struct intel_ring_buffer *ring = &dev_priv->ring[i];
+		struct i915_hw_context *dctx = ring->default_context;
 
 		/* Do a fake switch to the default context */
-		ring = &dev_priv->ring[i];
-		dctx = ring->default_context;
-		if (WARN_ON(!dctx))
+		if (ring->last_context == dctx)
 			continue;
 
 		if (!ring->last_context)
 			continue;
 
-		if (ring->last_context == dctx)
-			continue;
-
-		if (i == RCS) {
+		if (dctx->obj && i == RCS) {
 			WARN_ON(i915_gem_obj_ggtt_pin(dctx->obj,
 						      get_context_alignment(dev), 0));
 			/* Fake a finish/inactive */
@@ -394,44 +383,35 @@ void i915_gem_context_reset(struct drm_device *dev)
 int i915_gem_context_init(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_ring_buffer *ring;
+	struct i915_hw_context *ctx;
 	int i;
 
-	if (!HAS_HW_CONTEXTS(dev))
-		return 0;
-
 	/* Init should only be called once per module load. Eventually the
 	 * restriction on the context_disabled check can be loosened. */
 	if (WARN_ON(dev_priv->ring[RCS].default_context))
 		return 0;
 
-	dev_priv->hw_context_size = round_up(get_context_size(dev), 4096);
-
-	if (dev_priv->hw_context_size > (1<<20)) {
-		DRM_DEBUG_DRIVER("Disabling HW Contexts; invalid size\n");
-		return -E2BIG;
+	if (HAS_HW_CONTEXTS(dev)) {
+		dev_priv->hw_context_size = round_up(get_context_size(dev), 4096);
+		if (dev_priv->hw_context_size > (1<<20)) {
+			DRM_DEBUG_DRIVER("Disabling HW Contexts; invalid size %d\n",
+					 dev_priv->hw_context_size);
+			dev_priv->hw_context_size = 0;
+		}
 	}
 
-	dev_priv->ring[RCS].default_context =
-		i915_gem_create_context(dev, NULL, USES_PPGTT(dev));
-
-	if (IS_ERR_OR_NULL(dev_priv->ring[RCS].default_context)) {
-		DRM_DEBUG_DRIVER("Disabling HW Contexts; create failed %ld\n",
-				 PTR_ERR(dev_priv->ring[RCS].default_context));
-		return PTR_ERR(dev_priv->ring[RCS].default_context);
+	ctx = i915_gem_create_context(dev, NULL, USES_PPGTT(dev));
+	if (IS_ERR(ctx)) {
+		DRM_ERROR("Failed to create default global context (error %ld)\n",
+			  PTR_ERR(ctx));
+		return PTR_ERR(ctx);
 	}
 
-	for (i = RCS + 1; i < I915_NUM_RINGS; i++) {
-		if (!(INTEL_INFO(dev)->ring_mask & (1<<i)))
-			continue;
-
-		ring = &dev_priv->ring[i];
+	/* NB: RCS will hold a ref for all rings */
+	for (i = 0; i < I915_NUM_RINGS; i++)
+		dev_priv->ring[i].default_context = ctx;
 
-		/* NB: RCS will hold a ref for all rings */
-		ring->default_context = dev_priv->ring[RCS].default_context;
-	}
-
-	DRM_DEBUG_DRIVER("HW context support initialized\n");
+	DRM_DEBUG_DRIVER("%s context support initialized\n", dev_priv->hw_context_size ? "HW" : "fake");
 	return 0;
 }
 
@@ -441,33 +421,30 @@ void i915_gem_context_fini(struct drm_device *dev)
 	struct i915_hw_context *dctx = dev_priv->ring[RCS].default_context;
 	int i;
 
-	if (!HAS_HW_CONTEXTS(dev))
-		return;
-
-	/* The only known way to stop the gpu from accessing the hw context is
-	 * to reset it. Do this as the very last operation to avoid confusing
-	 * other code, leading to spurious errors. */
-	intel_gpu_reset(dev);
-
-	/* When default context is created and switched to, base object refcount
-	 * will be 2 (+1 from object creation and +1 from do_switch()).
-	 * i915_gem_context_fini() will be called after gpu_idle() has switched
-	 * to default context. So we need to unreference the base object once
-	 * to offset the do_switch part, so that i915_gem_context_unreference()
-	 * can then free the base object correctly. */
-	WARN_ON(!dev_priv->ring[RCS].last_context);
-	if (dev_priv->ring[RCS].last_context == dctx) {
-		/* Fake switch to NULL context */
-		WARN_ON(dctx->obj->active);
-		i915_gem_object_ggtt_unpin(dctx->obj);
-		i915_gem_context_unreference(dctx);
-		dev_priv->ring[RCS].last_context = NULL;
+	if (dctx->obj) {
+		/* The only known way to stop the gpu from accessing the hw context is
+		 * to reset it. Do this as the very last operation to avoid confusing
+		 * other code, leading to spurious errors. */
+		intel_gpu_reset(dev);
+
+		/* When default context is created and switched to, base object refcount
+		 * will be 2 (+1 from object creation and +1 from do_switch()).
+		 * i915_gem_context_fini() will be called after gpu_idle() has switched
+		 * to default context. So we need to unreference the base object once
+		 * to offset the do_switch part, so that i915_gem_context_unreference()
+		 * can then free the base object correctly. */
+		WARN_ON(!dev_priv->ring[RCS].last_context);
+		if (dev_priv->ring[RCS].last_context == dctx) {
+			/* Fake switch to NULL context */
+			WARN_ON(dctx->obj->active);
+			i915_gem_object_ggtt_unpin(dctx->obj);
+			i915_gem_context_unreference(dctx);
+			dev_priv->ring[RCS].last_context = NULL;
+		}
 	}
 
 	for (i = 0; i < I915_NUM_RINGS; i++) {
 		struct intel_ring_buffer *ring = &dev_priv->ring[i];
-		if (!(INTEL_INFO(dev)->ring_mask & (1<<i)))
-			continue;
 
 		if (ring->last_context)
 			i915_gem_context_unreference(ring->last_context);
@@ -478,7 +455,6 @@ void i915_gem_context_fini(struct drm_device *dev)
 
 	i915_gem_object_ggtt_unpin(dctx->obj);
 	i915_gem_context_unreference(dctx);
-	dev_priv->mm.aliasing_ppgtt = NULL;
 }
 
 int i915_gem_context_enable(struct drm_i915_private *dev_priv)
@@ -486,9 +462,6 @@ int i915_gem_context_enable(struct drm_i915_private *dev_priv)
 	struct intel_ring_buffer *ring;
 	int ret, i;
 
-	if (!HAS_HW_CONTEXTS(dev_priv->dev))
-		return 0;
-
 	/* This is the only place the aliasing PPGTT gets enabled, which means
 	 * it has to happen before we bail on reset */
 	if (dev_priv->mm.aliasing_ppgtt) {
@@ -503,7 +476,7 @@ int i915_gem_context_enable(struct drm_i915_private *dev_priv)
 	BUG_ON(!dev_priv->ring[RCS].default_context);
 
 	for_each_ring(ring, dev_priv, i) {
-		ret = do_switch(ring, ring->default_context);
+		ret = i915_switch_context(ring, ring->default_context);
 		if (ret)
 			return ret;
 	}
@@ -526,19 +499,6 @@ static int context_idr_cleanup(int id, void *p, void *data)
 int i915_gem_context_open(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_i915_file_private *file_priv = file->driver_priv;
-	struct drm_i915_private *dev_priv = dev->dev_private;
-
-	if (!HAS_HW_CONTEXTS(dev)) {
-		/* Cheat for hang stats */
-		file_priv->private_default_ctx =
-			kzalloc(sizeof(struct i915_hw_context), GFP_KERNEL);
-
-		if (file_priv->private_default_ctx == NULL)
-			return -ENOMEM;
-
-		file_priv->private_default_ctx->vm = &dev_priv->gtt.base;
-		return 0;
-	}
 
 	idr_init(&file_priv->context_idr);
 
@@ -559,14 +519,10 @@ void i915_gem_context_close(struct drm_device *dev, struct drm_file *file)
 {
 	struct drm_i915_file_private *file_priv = file->driver_priv;
 
-	if (!HAS_HW_CONTEXTS(dev)) {
-		kfree(file_priv->private_default_ctx);
-		return;
-	}
-
 	idr_for_each(&file_priv->context_idr, context_idr_cleanup, NULL);
-	i915_gem_context_unreference(file_priv->private_default_ctx);
 	idr_destroy(&file_priv->context_idr);
+
+	i915_gem_context_unreference(file_priv->private_default_ctx);
 }
 
 struct i915_hw_context *
@@ -574,9 +530,6 @@ i915_gem_context_get(struct drm_i915_file_private *file_priv, u32 id)
 {
 	struct i915_hw_context *ctx;
 
-	if (!HAS_HW_CONTEXTS(file_priv->dev_priv->dev))
-		return file_priv->private_default_ctx;
-
 	ctx = (struct i915_hw_context *)idr_find(&file_priv->context_idr, id);
 	if (!ctx)
 		return ERR_PTR(-ENOENT);
@@ -758,7 +711,6 @@ unpin_out:
 /**
  * i915_switch_context() - perform a GPU context switch.
  * @ring: ring for which we'll execute the context switch
- * @file_priv: file_priv associated with the context, may be NULL
  * @to: the context to switch to
  *
  * The context life cycle is simple. The context refcount is incremented and
@@ -767,24 +719,30 @@ unpin_out:
  * object while letting the normal object tracking destroy the backing BO.
  */
 int i915_switch_context(struct intel_ring_buffer *ring,
-			struct drm_file *file,
 			struct i915_hw_context *to)
 {
 	struct drm_i915_private *dev_priv = ring->dev->dev_private;
 
 	WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
 
-	BUG_ON(file && to == NULL);
-
-	/* We have the fake context */
-	if (!HAS_HW_CONTEXTS(ring->dev)) {
-		ring->last_context = to;
+	if (to->obj == NULL) { /* We have the fake context */
+		if (to != ring->last_context) {
+			i915_gem_context_reference(to);
+			if (ring->last_context)
+				i915_gem_context_unreference(ring->last_context);
+			ring->last_context = to;
+		}
 		return 0;
 	}
 
 	return do_switch(ring, to);
 }
 
+static bool hw_context_enabled(struct drm_device *dev)
+{
+	return to_i915(dev)->hw_context_size;
+}
+
 int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
 				  struct drm_file *file)
 {
@@ -793,7 +751,7 @@ int i915_gem_context_create_ioctl(struct drm_device *dev, void *data,
 	struct i915_hw_context *ctx;
 	int ret;
 
-	if (!HAS_HW_CONTEXTS(dev))
+	if (!hw_context_enabled(dev))
 		return -ENODEV;
 
 	ret = i915_mutex_lock_interruptible(dev);

drivers/gpu/drm/i915/i915_gem_execbuffer.c

@@ -1221,7 +1221,7 @@ i915_gem_do_execbuffer(struct drm_device *dev, void *data,
 	if (ret)
 		goto err;
 
-	ret = i915_switch_context(ring, file, ctx);
+	ret = i915_switch_context(ring, ctx);
 	if (ret)
 		goto err;
 

drivers/gpu/drm/i915/intel_bios.c

@@ -287,6 +287,9 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
 	const struct bdb_lfp_backlight_data *backlight_data;
 	const struct bdb_lfp_backlight_data_entry *entry;
 
+	/* Err to enabling backlight if no backlight block. */
+	dev_priv->vbt.backlight.present = true;
+
 	backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
 	if (!backlight_data)
 		return;
@@ -299,6 +302,13 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
 
 	entry = &backlight_data->data[panel_type];
 
+	dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
+	if (!dev_priv->vbt.backlight.present) {
+		DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
+			      entry->type);
+		return;
+	}
+
 	dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
 	dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
 	DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "

drivers/gpu/drm/i915/intel_bios.h

@@ -374,6 +374,9 @@ struct bdb_lvds_lfp_data {
 	struct bdb_lvds_lfp_data_entry data[16];
 } __packed;
 
+#define BDB_BACKLIGHT_TYPE_NONE	0
+#define BDB_BACKLIGHT_TYPE_PWM	2
+
 struct bdb_lfp_backlight_data_entry {
 	u8 type:2;
 	u8 active_low_pwm:1;

drivers/gpu/drm/i915/intel_dp.c

@@ -575,7 +575,8 @@ out:
 	return ret;
 }
 
-#define HEADER_SIZE	4
+#define BARE_ADDRESS_SIZE	3
+#define HEADER_SIZE		(BARE_ADDRESS_SIZE + 1)
 static ssize_t
 intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 {
@@ -592,7 +593,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 	switch (msg->request & ~DP_AUX_I2C_MOT) {
 	case DP_AUX_NATIVE_WRITE:
 	case DP_AUX_I2C_WRITE:
-		txsize = HEADER_SIZE + msg->size;
+		txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
 		rxsize = 1;
 
 		if (WARN_ON(txsize > 20))
@@ -611,7 +612,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 
 	case DP_AUX_NATIVE_READ:
 	case DP_AUX_I2C_READ:
-		txsize = HEADER_SIZE;
+		txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
 		rxsize = msg->size + 1;
 
 		if (WARN_ON(rxsize > 20))

drivers/gpu/drm/i915/intel_panel.c

@@ -1065,6 +1065,11 @@ int intel_panel_setup_backlight(struct drm_connector *connector)
 	unsigned long flags;
 	int ret;
 
+	if (!dev_priv->vbt.backlight.present) {
+		DRM_DEBUG_KMS("native backlight control not available per VBT\n");
+		return 0;
+	}
+
 	/* set level and max in panel struct */
 	spin_lock_irqsave(&dev_priv->backlight_lock, flags);
 	ret = dev_priv->display.setup_backlight(intel_connector);

drivers/gpu/drm/i915/intel_pm.c

@@ -1545,6 +1545,16 @@ static void i9xx_update_wm(struct drm_crtc *unused_crtc)
 
 	DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
 
+	if (IS_I915GM(dev) && enabled) {
+		struct intel_framebuffer *fb;
+
+		fb = to_intel_framebuffer(enabled->primary->fb);
+
+		/* self-refresh seems busted with untiled */
+		if (fb->obj->tiling_mode == I915_TILING_NONE)
+			enabled = NULL;
+	}
+
 	/*
 	 * Overlay gets an aggressive default since video jitter is bad.
 	 */

drivers/gpu/drm/nouveau/core/subdev/bios/base.c

@@ -109,7 +109,7 @@ nouveau_bios_shadow_pramin(struct nouveau_bios *bios)
 			return;
 		}
 
-		addr = (u64)(addr >> 8) << 8;
+		addr = (addr & 0xffffff00) << 8;
 		if (!addr) {
 			addr  = (u64)nv_rd32(bios, 0x001700) << 16;
 			addr += 0xf0000;

drivers/gpu/drm/omapdrm/omap_crtc.c

@@ -33,6 +33,7 @@ struct omap_crtc {
 	int pipe;
 	enum omap_channel channel;
 	struct omap_overlay_manager_info info;
+	struct drm_encoder *current_encoder;
 
 	/*
 	 * Temporary: eventually this will go away, but it is needed
@@ -120,13 +121,25 @@ static void omap_crtc_start_update(struct omap_overlay_manager *mgr)
 {
 }
 
+static void set_enabled(struct drm_crtc *crtc, bool enable);
+
 static int omap_crtc_enable(struct omap_overlay_manager *mgr)
 {
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
+
+	dispc_mgr_setup(omap_crtc->channel, &omap_crtc->info);
+	dispc_mgr_set_timings(omap_crtc->channel,
+			&omap_crtc->timings);
+	set_enabled(&omap_crtc->base, true);
+
 	return 0;
 }
 
 static void omap_crtc_disable(struct omap_overlay_manager *mgr)
 {
+	struct omap_crtc *omap_crtc = omap_crtcs[mgr->id];
+
+	set_enabled(&omap_crtc->base, false);
 }
 
 static void omap_crtc_set_timings(struct omap_overlay_manager *mgr,
@@ -184,7 +197,6 @@ static void omap_crtc_destroy(struct drm_crtc *crtc)
 	WARN_ON(omap_crtc->apply_irq.registered);
 	omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
 
-	omap_crtc->plane->funcs->destroy(omap_crtc->plane);
 	drm_crtc_cleanup(crtc);
 
 	kfree(omap_crtc);
@@ -338,17 +350,23 @@ static int omap_crtc_page_flip_locked(struct drm_crtc *crtc,
 	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 	struct drm_plane *primary = crtc->primary;
 	struct drm_gem_object *bo;
+	unsigned long flags;
 
 	DBG("%d -> %d (event=%p)", primary->fb ? primary->fb->base.id : -1,
 			fb->base.id, event);
 
+	spin_lock_irqsave(&dev->event_lock, flags);
+
 	if (omap_crtc->old_fb) {
+		spin_unlock_irqrestore(&dev->event_lock, flags);
 		dev_err(dev->dev, "already a pending flip\n");
 		return -EINVAL;
 	}
 
 	omap_crtc->event = event;
-	primary->fb = fb;
+	omap_crtc->old_fb = primary->fb = fb;
+
+	spin_unlock_irqrestore(&dev->event_lock, flags);
 
 	/*
 	 * Hold a reference temporarily until the crtc is updated
@@ -528,38 +546,46 @@ static void set_enabled(struct drm_crtc *crtc, bool enable)
 	struct drm_device *dev = crtc->dev;
 	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
 	enum omap_channel channel = omap_crtc->channel;
-	struct omap_irq_wait *wait = NULL;
+	struct omap_irq_wait *wait;
+	u32 framedone_irq, vsync_irq;
+	int ret;
 
 	if (dispc_mgr_is_enabled(channel) == enable)
 		return;
 
-	/* ignore sync-lost irqs during enable/disable */
+	/*
+	 * Digit output produces some sync lost interrupts during the first
+	 * frame when enabling, so we need to ignore those.
+	 */
 	omap_irq_unregister(crtc->dev, &omap_crtc->error_irq);
 
-	if (dispc_mgr_get_framedone_irq(channel)) {
-		if (!enable) {
-			wait = omap_irq_wait_init(dev,
-					dispc_mgr_get_framedone_irq(channel), 1);
-		}
+	framedone_irq = dispc_mgr_get_framedone_irq(channel);
+	vsync_irq = dispc_mgr_get_vsync_irq(channel);
+
+	if (enable) {
+		wait = omap_irq_wait_init(dev, vsync_irq, 1);
 	} else {
 		/*
-		 * When we disable digit output, we need to wait until fields
-		 * are done.  Otherwise the DSS is still working, and turning
-		 * off the clocks prevents DSS from going to OFF mode. And when
-		 * enabling, we need to wait for the extra sync losts
+		 * When we disable the digit output, we need to wait for
+		 * FRAMEDONE to know that DISPC has finished with the output.
+		 *
+		 * OMAP2/3 does not have FRAMEDONE irq for digit output, and in
+		 * that case we need to use vsync interrupt, and wait for both
+		 * even and odd frames.
 		 */
-		wait = omap_irq_wait_init(dev,
-				dispc_mgr_get_vsync_irq(channel), 2);
+
+		if (framedone_irq)
+			wait = omap_irq_wait_init(dev, framedone_irq, 1);
+		else
+			wait = omap_irq_wait_init(dev, vsync_irq, 2);
 	}
 
 	dispc_mgr_enable(channel, enable);
 
-	if (wait) {
-		int ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100));
-		if (ret) {
-			dev_err(dev->dev, "%s: timeout waiting for %s\n",
-					omap_crtc->name, enable ? "enable" : "disable");
-		}
+	ret = omap_irq_wait(dev, wait, msecs_to_jiffies(100));
+	if (ret) {
+		dev_err(dev->dev, "%s: timeout waiting for %s\n",
+				omap_crtc->name, enable ? "enable" : "disable");
 	}
 
 	omap_irq_register(crtc->dev, &omap_crtc->error_irq);
@@ -586,8 +612,12 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
 		}
 	}
 
+	if (omap_crtc->current_encoder && encoder != omap_crtc->current_encoder)
+		omap_encoder_set_enabled(omap_crtc->current_encoder, false);
+
+	omap_crtc->current_encoder = encoder;
+
 	if (!omap_crtc->enabled) {
-		set_enabled(&omap_crtc->base, false);
 		if (encoder)
 			omap_encoder_set_enabled(encoder, false);
 	} else {
@@ -596,13 +626,7 @@ static void omap_crtc_pre_apply(struct omap_drm_apply *apply)
 			omap_encoder_update(encoder, omap_crtc->mgr,
 					&omap_crtc->timings);
 			omap_encoder_set_enabled(encoder, true);
-			omap_crtc->full_update = false;
 		}
-
-		dispc_mgr_setup(omap_crtc->channel, &omap_crtc->info);
-		dispc_mgr_set_timings(omap_crtc->channel,
-				&omap_crtc->timings);
-		set_enabled(&omap_crtc->base, true);
 	}
 
 	omap_crtc->full_update = false;
@@ -613,10 +637,30 @@ static void omap_crtc_post_apply(struct omap_drm_apply *apply)
 	/* nothing needed for post-apply */
 }
 
+void omap_crtc_flush(struct drm_crtc *crtc)
+{
+	struct omap_crtc *omap_crtc = to_omap_crtc(crtc);
+	int loops = 0;
+
+	while (!list_empty(&omap_crtc->pending_applies) ||
+		!list_empty(&omap_crtc->queued_applies) ||
+		omap_crtc->event || omap_crtc->old_fb) {
+
+		if (++loops > 10) {
+			dev_err(crtc->dev->dev,
+				"omap_crtc_flush() timeout\n");
+			break;
+		}
+
+		schedule_timeout_uninterruptible(msecs_to_jiffies(20));
+	}
+}
+
 static const char *channel_names[] = {
 		[OMAP_DSS_CHANNEL_LCD] = "lcd",
 		[OMAP_DSS_CHANNEL_DIGIT] = "tv",
 		[OMAP_DSS_CHANNEL_LCD2] = "lcd2",
+		[OMAP_DSS_CHANNEL_LCD3] = "lcd3",
 };
 
 void omap_crtc_pre_init(void)

drivers/gpu/drm/omapdrm/omap_drv.c

@@ -513,12 +513,18 @@ static int dev_load(struct drm_device *dev, unsigned long flags)
 static int dev_unload(struct drm_device *dev)
 {
 	struct omap_drm_private *priv = dev->dev_private;
+	int i;
 
 	DBG("unload: dev=%p", dev);
 
 	drm_kms_helper_poll_fini(dev);
 
 	omap_fbdev_free(dev);
+
+	/* flush crtcs so the fbs get released */
+	for (i = 0; i < priv->num_crtcs; i++)
+		omap_crtc_flush(priv->crtcs[i]);
+
 	omap_modeset_free(dev);
 	omap_gem_deinit(dev);
 
@@ -696,10 +702,11 @@ static int pdev_remove(struct platform_device *device)
 {
 	DBG("");
 
+	drm_put_dev(platform_get_drvdata(device));
+
 	omap_disconnect_dssdevs();
 	omap_crtc_pre_uninit();
 
-	drm_put_dev(platform_get_drvdata(device));
 	return 0;
 }
 
@@ -726,18 +733,33 @@ static struct platform_driver pdev = {
 
 static int __init omap_drm_init(void)
 {
+	int r;
+
 	DBG("init");
-	if (platform_driver_register(&omap_dmm_driver)) {
-		/* we can continue on without DMM.. so not fatal */
-		dev_err(NULL, "DMM registration failed\n");
+
+	r = platform_driver_register(&omap_dmm_driver);
+	if (r) {
+		pr_err("DMM driver registration failed\n");
+		return r;
+	}
+
+	r = platform_driver_register(&pdev);
+	if (r) {
+		pr_err("omapdrm driver registration failed\n");
+		platform_driver_unregister(&omap_dmm_driver);
+		return r;
 	}
-	return platform_driver_register(&pdev);
+
+	return 0;
 }
 
 static void __exit omap_drm_fini(void)
 {
 	DBG("fini");
+
 	platform_driver_unregister(&pdev);
+
+	platform_driver_unregister(&omap_dmm_driver);
 }
 
 /* need late_initcall() so we load after dss_driver's are loaded */

drivers/gpu/drm/omapdrm/omap_drv.h

@@ -163,6 +163,7 @@ void omap_crtc_pre_init(void);
 void omap_crtc_pre_uninit(void);
 struct drm_crtc *omap_crtc_init(struct drm_device *dev,
 		struct drm_plane *plane, enum omap_channel channel, int id);
+void omap_crtc_flush(struct drm_crtc *crtc);
 
 struct drm_plane *omap_plane_init(struct drm_device *dev,
 		int plane_id, bool private_plane);

drivers/gpu/drm/omapdrm/omap_fb.c

@@ -218,6 +218,20 @@ void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 		info->rotation_type = OMAP_DSS_ROT_TILER;
 		info->screen_width  = omap_gem_tiled_stride(plane->bo, orient);
 	} else {
+		switch (win->rotation & 0xf) {
+		case 0:
+		case BIT(DRM_ROTATE_0):
+			/* OK */
+			break;
+
+		default:
+			dev_warn(fb->dev->dev,
+				"rotation '%d' ignored for non-tiled fb\n",
+				win->rotation);
+			win->rotation = 0;
+			break;
+		}
+
 		info->paddr         = get_linear_addr(plane, format, 0, x, y);
 		info->rotation_type = OMAP_DSS_ROT_DMA;
 		info->screen_width  = plane->pitch;

drivers/gpu/drm/omapdrm/omap_fbdev.c

@@ -371,6 +371,9 @@ void omap_fbdev_free(struct drm_device *dev)
 
 	fbdev = to_omap_fbdev(priv->fbdev);
 
+	/* release the ref taken in omap_fbdev_create() */
+	omap_gem_put_paddr(fbdev->bo);
+
 	/* this will free the backing object */
 	if (fbdev->fb) {
 		drm_framebuffer_unregister_private(fbdev->fb);

drivers/gpu/drm/omapdrm/omap_gem.c

@@ -980,12 +980,9 @@ int omap_gem_resume(struct device *dev)
 #ifdef CONFIG_DEBUG_FS
 void omap_gem_describe(struct drm_gem_object *obj, struct seq_file *m)
 {
-	struct drm_device *dev = obj->dev;
 	struct omap_gem_object *omap_obj = to_omap_bo(obj);
 	uint64_t off;
 
-	WARN_ON(!mutex_is_locked(&dev->struct_mutex));
-
 	off = drm_vma_node_start(&obj->vma_node);
 
 	seq_printf(m, "%08x: %2d (%2d) %08llx %08Zx (%2d) %p %4d",
@@ -1050,10 +1047,10 @@ static inline bool is_waiting(struct omap_gem_sync_waiter *waiter)
 {
 	struct omap_gem_object *omap_obj = waiter->omap_obj;
 	if ((waiter->op & OMAP_GEM_READ) &&
-			(omap_obj->sync->read_complete < waiter->read_target))
+			(omap_obj->sync->write_complete < waiter->write_target))
 		return true;
 	if ((waiter->op & OMAP_GEM_WRITE) &&
-			(omap_obj->sync->write_complete < waiter->write_target))
+			(omap_obj->sync->read_complete < waiter->read_target))
 		return true;
 	return false;
 }
@@ -1229,6 +1226,8 @@ int omap_gem_op_async(struct drm_gem_object *obj, enum omap_gem_op op,
 		}
 
 		spin_unlock(&sync_lock);
+
+		kfree(waiter);
 	}
 
 	/* no waiting.. */

drivers/gpu/drm/omapdrm/omap_plane.c

@@ -225,6 +225,11 @@ int omap_plane_mode_set(struct drm_plane *plane,
 		omap_plane->apply_done_cb.arg = arg;
 	}
 
+	if (plane->fb)
+		drm_framebuffer_unreference(plane->fb);
+
+	drm_framebuffer_reference(fb);
+
 	plane->fb = fb;
 	plane->crtc = crtc;
 
@@ -241,10 +246,13 @@ static int omap_plane_update(struct drm_plane *plane,
 	struct omap_plane *omap_plane = to_omap_plane(plane);
 	omap_plane->enabled = true;
 
-	if (plane->fb)
-		drm_framebuffer_unreference(plane->fb);
-
-	drm_framebuffer_reference(fb);
+	/* omap_plane_mode_set() takes adjusted src */
+	switch (omap_plane->win.rotation & 0xf) {
+	case BIT(DRM_ROTATE_90):
+	case BIT(DRM_ROTATE_270):
+		swap(src_w, src_h);
+		break;
+	}
 
 	return omap_plane_mode_set(plane, crtc, fb,
 			crtc_x, crtc_y, crtc_w, crtc_h,

drivers/gpu/drm/radeon/atombios_dp.c

@@ -142,7 +142,8 @@ static int radeon_process_aux_ch(struct radeon_i2c_chan *chan,
 	return recv_bytes;
 }
 
-#define HEADER_SIZE 4
+#define BARE_ADDRESS_SIZE 3
+#define HEADER_SIZE (BARE_ADDRESS_SIZE + 1)
 
 static ssize_t
 radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
@@ -160,13 +161,19 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 	tx_buf[0] = msg->address & 0xff;
 	tx_buf[1] = msg->address >> 8;
 	tx_buf[2] = msg->request << 4;
-	tx_buf[3] = msg->size - 1;
+	tx_buf[3] = msg->size ? (msg->size - 1) : 0;
 
 	switch (msg->request & ~DP_AUX_I2C_MOT) {
 	case DP_AUX_NATIVE_WRITE:
 	case DP_AUX_I2C_WRITE:
+		/* tx_size needs to be 4 even for bare address packets since the atom
+		 * table needs the info in tx_buf[3].
+		 */
 		tx_size = HEADER_SIZE + msg->size;
-		tx_buf[3] |= tx_size << 4;
+		if (msg->size == 0)
+			tx_buf[3] |= BARE_ADDRESS_SIZE << 4;
+		else
+			tx_buf[3] |= tx_size << 4;
 		memcpy(tx_buf + HEADER_SIZE, msg->buffer, msg->size);
 		ret = radeon_process_aux_ch(chan,
 					    tx_buf, tx_size, NULL, 0, delay, &ack);
@@ -176,8 +183,14 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 		break;
 	case DP_AUX_NATIVE_READ:
 	case DP_AUX_I2C_READ:
+		/* tx_size needs to be 4 even for bare address packets since the atom
+		 * table needs the info in tx_buf[3].
+		 */
 		tx_size = HEADER_SIZE;
-		tx_buf[3] |= tx_size << 4;
+		if (msg->size == 0)
+			tx_buf[3] |= BARE_ADDRESS_SIZE << 4;
+		else
+			tx_buf[3] |= tx_size << 4;
 		ret = radeon_process_aux_ch(chan,
 					    tx_buf, tx_size, msg->buffer, msg->size, delay, &ack);
 		break;
@@ -186,7 +199,7 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 		break;
 	}
 
-	if (ret > 0)
+	if (ret >= 0)
 		msg->reply = ack >> 4;
 
 	return ret;
@@ -194,98 +207,15 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 
 void radeon_dp_aux_init(struct radeon_connector *radeon_connector)
 {
-	struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
-
-	dig_connector->dp_i2c_bus->aux.dev = radeon_connector->base.kdev;
-	dig_connector->dp_i2c_bus->aux.transfer = radeon_dp_aux_transfer;
-}
-
-int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
-			 u8 write_byte, u8 *read_byte)
-{
-	struct i2c_algo_dp_aux_data *algo_data = adapter->algo_data;
-	struct radeon_i2c_chan *auxch = i2c_get_adapdata(adapter);
-	u16 address = algo_data->address;
-	u8 msg[5];
-	u8 reply[2];
-	unsigned retry;
-	int msg_bytes;
-	int reply_bytes = 1;
 	int ret;
-	u8 ack;
-
-	/* Set up the address */
-	msg[0] = address;
-	msg[1] = address >> 8;
-
-	/* Set up the command byte */
-	if (mode & MODE_I2C_READ) {
-		msg[2] = DP_AUX_I2C_READ << 4;
-		msg_bytes = 4;
-		msg[3] = msg_bytes << 4;
-	} else {
-		msg[2] = DP_AUX_I2C_WRITE << 4;
-		msg_bytes = 5;
-		msg[3] = msg_bytes << 4;
-		msg[4] = write_byte;
-	}
-
-	/* special handling for start/stop */
-	if (mode & (MODE_I2C_START | MODE_I2C_STOP))
-		msg[3] = 3 << 4;
-
-	/* Set MOT bit for all but stop */
-	if ((mode & MODE_I2C_STOP) == 0)
-		msg[2] |= DP_AUX_I2C_MOT << 4;
-
-	for (retry = 0; retry < 7; retry++) {
-		ret = radeon_process_aux_ch(auxch,
-					    msg, msg_bytes, reply, reply_bytes, 0, &ack);
-		if (ret == -EBUSY)
-			continue;
-		else if (ret < 0) {
-			DRM_DEBUG_KMS("aux_ch failed %d\n", ret);
-			return ret;
-		}
-
-		switch ((ack >> 4) & DP_AUX_NATIVE_REPLY_MASK) {
-		case DP_AUX_NATIVE_REPLY_ACK:
-			/* I2C-over-AUX Reply field is only valid
-			 * when paired with AUX ACK.
-			 */
-			break;
-		case DP_AUX_NATIVE_REPLY_NACK:
-			DRM_DEBUG_KMS("aux_ch native nack\n");
-			return -EREMOTEIO;
-		case DP_AUX_NATIVE_REPLY_DEFER:
-			DRM_DEBUG_KMS("aux_ch native defer\n");
-			usleep_range(500, 600);
-			continue;
-		default:
-			DRM_ERROR("aux_ch invalid native reply 0x%02x\n", ack);
-			return -EREMOTEIO;
-		}
 
-		switch ((ack >> 4) & DP_AUX_I2C_REPLY_MASK) {
-		case DP_AUX_I2C_REPLY_ACK:
-			if (mode == MODE_I2C_READ)
-				*read_byte = reply[0];
-			return ret;
-		case DP_AUX_I2C_REPLY_NACK:
-			DRM_DEBUG_KMS("aux_i2c nack\n");
-			return -EREMOTEIO;
-		case DP_AUX_I2C_REPLY_DEFER:
-			DRM_DEBUG_KMS("aux_i2c defer\n");
-			usleep_range(400, 500);
-			break;
-		default:
-			DRM_ERROR("aux_i2c invalid reply 0x%02x\n", ack);
-			return -EREMOTEIO;
-		}
-	}
+	radeon_connector->ddc_bus->aux.dev = radeon_connector->base.kdev;
+	radeon_connector->ddc_bus->aux.transfer = radeon_dp_aux_transfer;
+	ret = drm_dp_aux_register_i2c_bus(&radeon_connector->ddc_bus->aux);
+	if (!ret)
+		radeon_connector->ddc_bus->has_aux = true;
 
-	DRM_DEBUG_KMS("aux i2c too many retries, giving up\n");
-	return -EREMOTEIO;
+	WARN(ret, "drm_dp_aux_register_i2c_bus() failed with error %d\n", ret);
 }
 
 /***** general DP utility functions *****/
@@ -420,12 +350,11 @@ static u8 radeon_dp_encoder_service(struct radeon_device *rdev,
 
 u8 radeon_dp_getsinktype(struct radeon_connector *radeon_connector)
 {
-	struct radeon_connector_atom_dig *dig_connector = radeon_connector->con_priv;
 	struct drm_device *dev = radeon_connector->base.dev;
 	struct radeon_device *rdev = dev->dev_private;
 
 	return radeon_dp_encoder_service(rdev, ATOM_DP_ACTION_GET_SINK_TYPE, 0,
-					 dig_connector->dp_i2c_bus->rec.i2c_id, 0);
+					 radeon_connector->ddc_bus->rec.i2c_id, 0);
 }
 
 static void radeon_dp_probe_oui(struct radeon_connector *radeon_connector)
@@ -436,11 +365,11 @@ static void radeon_dp_probe_oui(struct radeon_connector *radeon_connector)
 	if (!(dig_connector->dpcd[DP_DOWN_STREAM_PORT_COUNT] & DP_OUI_SUPPORT))
 		return;
 
-	if (drm_dp_dpcd_read(&dig_connector->dp_i2c_bus->aux, DP_SINK_OUI, buf, 3))
+	if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_SINK_OUI, buf, 3))
 		DRM_DEBUG_KMS("Sink OUI: %02hx%02hx%02hx\n",
 			      buf[0], buf[1], buf[2]);
 
-	if (drm_dp_dpcd_read(&dig_connector->dp_i2c_bus->aux, DP_BRANCH_OUI, buf, 3))
+	if (drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_BRANCH_OUI, buf, 3))
 		DRM_DEBUG_KMS("Branch OUI: %02hx%02hx%02hx\n",
 			      buf[0], buf[1], buf[2]);
 }
@@ -451,7 +380,7 @@ bool radeon_dp_getdpcd(struct radeon_connector *radeon_connector)
 	u8 msg[DP_DPCD_SIZE];
 	int ret, i;
 
-	ret = drm_dp_dpcd_read(&dig_connector->dp_i2c_bus->aux, DP_DPCD_REV, msg,
+	ret = drm_dp_dpcd_read(&radeon_connector->ddc_bus->aux, DP_DPCD_REV, msg,
 			       DP_DPCD_SIZE);
 	if (ret > 0) {
 		memcpy(dig_connector->dpcd, msg, DP_DPCD_SIZE);
@@ -489,7 +418,7 @@ int radeon_dp_get_panel_mode(struct drm_encoder *encoder,
 
 	if (dp_bridge != ENCODER_OBJECT_ID_NONE) {
 		/* DP bridge chips */
-		drm_dp_dpcd_readb(&dig_connector->dp_i2c_bus->aux,
+		drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux,
 				  DP_EDP_CONFIGURATION_CAP, &tmp);
 		if (tmp & 1)
 			panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
@@ -500,7 +429,7 @@ int radeon_dp_get_panel_mode(struct drm_encoder *encoder,
 			panel_mode = DP_PANEL_MODE_EXTERNAL_DP_MODE;
 	} else if (connector->connector_type == DRM_MODE_CONNECTOR_eDP) {
 		/* eDP */
-		drm_dp_dpcd_readb(&dig_connector->dp_i2c_bus->aux,
+		drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux,
 				  DP_EDP_CONFIGURATION_CAP, &tmp);
 		if (tmp & 1)
 			panel_mode = DP_PANEL_MODE_INTERNAL_DP2_MODE;
@@ -554,7 +483,8 @@ bool radeon_dp_needs_link_train(struct radeon_connector *radeon_connector)
 	u8 link_status[DP_LINK_STATUS_SIZE];
 	struct radeon_connector_atom_dig *dig = radeon_connector->con_priv;
 
-	if (drm_dp_dpcd_read_link_status(&dig->dp_i2c_bus->aux, link_status) <= 0)
+	if (drm_dp_dpcd_read_link_status(&radeon_connector->ddc_bus->aux, link_status)
+	    <= 0)
 		return false;
 	if (drm_dp_channel_eq_ok(link_status, dig->dp_lane_count))
 		return false;
@@ -574,7 +504,7 @@ void radeon_dp_set_rx_power_state(struct drm_connector *connector,
 
 	/* power up/down the sink */
 	if (dig_connector->dpcd[0] >= 0x11) {
-		drm_dp_dpcd_writeb(&dig_connector->dp_i2c_bus->aux,
+		drm_dp_dpcd_writeb(&radeon_connector->ddc_bus->aux,
 				   DP_SET_POWER, power_state);
 		usleep_range(1000, 2000);
 	}
@@ -878,7 +808,7 @@ void radeon_dp_link_train(struct drm_encoder *encoder,
 	else
 		dp_info.enc_id |= ATOM_DP_CONFIG_LINK_A;
 
-	drm_dp_dpcd_readb(&dig_connector->dp_i2c_bus->aux, DP_MAX_LANE_COUNT, &tmp);
+	drm_dp_dpcd_readb(&radeon_connector->ddc_bus->aux, DP_MAX_LANE_COUNT, &tmp);
 	if (ASIC_IS_DCE5(rdev) && (tmp & DP_TPS3_SUPPORTED))
 		dp_info.tp3_supported = true;
 	else
@@ -890,7 +820,7 @@ void radeon_dp_link_train(struct drm_encoder *encoder,
 	dp_info.connector = connector;
 	dp_info.dp_lane_count = dig_connector->dp_lane_count;
 	dp_info.dp_clock = dig_connector->dp_clock;
-	dp_info.aux = &dig_connector->dp_i2c_bus->aux;
+	dp_info.aux = &radeon_connector->ddc_bus->aux;
 
 	if (radeon_dp_link_train_init(&dp_info))
 		goto done;