usbip: vudc: Make usbip_common vudc-aware

Add constants for VUDC events in usbip_common.h
and make use of them in usbip_common.c.

This commit is a result of cooperation between Samsung R&D Institute
Poland and Open Operating Systems Student Society at University
of Warsaw (O2S3@UW) consisting of:

    Igor Kotrasinski <ikotrasinsk@gmail.com>
    Karol Kosik <karo9@interia.eu>
    Ewelina Kosmider <3w3lfin@gmail.com>
    Dawid Lazarczyk <lazarczyk.dawid@gmail.com>
    Piotr Szulc <ps347277@students.mimuw.edu.pl>

Tutor and project owner:
    Krzysztof Opasiak <k.opasiak@samsung.com>

Signed-off-by: Igor Kotrasinski <i.kotrasinsk@samsung.com>
Signed-off-by: Karol Kosik <karo9@interia.eu>
[Small fixes and commit message update]
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/usbip/usbip_common.c

@@ -1,5 +1,7 @@
 /*
  * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ *               Krzysztof Opasiak <k.opasiak@samsung.com>
  *
  * This is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -643,7 +645,7 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
 			ret);
 		kfree(buff);
 
-		if (ud->side == USBIP_STUB)
+		if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC)
 			usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
 		else
 			usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
@@ -665,7 +667,7 @@ int usbip_recv_iso(struct usbip_device *ud, struct urb *urb)
 			"total length of iso packets %d not equal to actual length of buffer %d\n",
 			total_length, urb->actual_length);
 
-		if (ud->side == USBIP_STUB)
+		if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC)
 			usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
 		else
 			usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);
@@ -723,7 +725,7 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
 	int ret;
 	int size;
 
-	if (ud->side == USBIP_STUB) {
+	if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
 		/* the direction of urb must be OUT. */
 		if (usb_pipein(urb->pipe))
 			return 0;
@@ -755,7 +757,7 @@ int usbip_recv_xbuff(struct usbip_device *ud, struct urb *urb)
 	ret = usbip_recv(ud->tcp_socket, urb->transfer_buffer, size);
 	if (ret != size) {
 		dev_err(&urb->dev->dev, "recv xbuf, %d\n", ret);
-		if (ud->side == USBIP_STUB) {
+		if (ud->side == USBIP_STUB || ud->side == USBIP_VUDC) {
 			usbip_event_add(ud, SDEV_EVENT_ERROR_TCP);
 		} else {
 			usbip_event_add(ud, VDEV_EVENT_ERROR_TCP);

drivers/usb/usbip/usbip_common.h

@@ -1,5 +1,7 @@
 /*
  * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ *               Krzysztof Opasiak <k.opasiak@samsung.com>
  *
  * This is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -234,6 +236,7 @@ struct usbip_iso_packet_descriptor {
 enum usbip_side {
 	USBIP_VHCI,
 	USBIP_STUB,
+	USBIP_VUDC,
 };
 
 /* event handler */
@@ -248,6 +251,13 @@ enum usbip_side {
 #define	SDEV_EVENT_ERROR_SUBMIT	(USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
 #define	SDEV_EVENT_ERROR_MALLOC	(USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
 
+#define VUDC_EVENT_REMOVED   (USBIP_EH_SHUTDOWN | USBIP_EH_RESET | USBIP_EH_BYE)
+#define	VUDC_EVENT_DOWN		(USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+#define	VUDC_EVENT_ERROR_TCP	(USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
+/* catastrophic emulated usb error */
+#define	VUDC_EVENT_ERROR_USB	(USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+#define	VUDC_EVENT_ERROR_MALLOC	(USBIP_EH_SHUTDOWN | USBIP_EH_UNUSABLE)
+
 #define	VDEV_EVENT_REMOVED	(USBIP_EH_SHUTDOWN | USBIP_EH_BYE)
 #define	VDEV_EVENT_DOWN		(USBIP_EH_SHUTDOWN | USBIP_EH_RESET)
 #define	VDEV_EVENT_ERROR_TCP	(USBIP_EH_SHUTDOWN | USBIP_EH_RESET)