Merge tag 'tpmdd-next-20160927' of git://git.infradead.org/users/jjs/linux-tpmdd into ra-next

tpmdd reverts for Linux 4.9

Revert patches mistakenly included.

"Hi James,

I had a typo in my PR command:

git request-pull security/next git://git.infradead.org/users/jjs/linux-tpmdd.git master > tpmdd-next-20160915.txt
                                                                                 ^^^^^^
That should have been the signed tag tpmdd-next-20160915. This caused
four commits slip into your tree that are not meant for 4.9 release. I
created a script to generate the signed tag + PR as a corrective
measure.

/Jarkko"

drivers/char/tpm/tpm-interface.c

@@ -29,7 +29,6 @@
 #include <linux/mutex.h>
 #include <linux/spinlock.h>
 #include <linux/freezer.h>
-#include <linux/pm_runtime.h>
 
 #include "tpm.h"
 #include "tpm_eventlog.h"
@@ -357,8 +356,6 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
 	if (!(flags & TPM_TRANSMIT_UNLOCKED))
 		mutex_lock(&chip->tpm_mutex);
 
-	pm_runtime_get_sync(chip->dev.parent);
-
 	rc = chip->ops->send(chip, (u8 *) buf, count);
 	if (rc < 0) {
 		dev_err(&chip->dev,
@@ -400,8 +397,6 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const u8 *buf, size_t bufsiz,
 		dev_err(&chip->dev,
 			"tpm_transmit: tpm_recv: error %zd\n", rc);
 out:
-	pm_runtime_put(chip->dev.parent);
-
 	if (!(flags & TPM_TRANSMIT_UNLOCKED))
 		mutex_unlock(&chip->tpm_mutex);
 	return rc;

drivers/char/tpm/tpm_crb.c

@@ -19,7 +19,6 @@
 #include <linux/highmem.h>
 #include <linux/rculist.h>
 #include <linux/module.h>
-#include <linux/pm_runtime.h>
 #include "tpm.h"
 
 #define ACPI_SIG_TPM2 "TPM2"
@@ -84,74 +83,7 @@ struct crb_priv {
 	u32 cmd_size;
 };
 
-/**
- * crb_go_idle - request tpm crb device to go the idle state
- *
- * @dev:  crb device
- * @priv: crb private data
- *
- * Write CRB_CTRL_REQ_GO_IDLE to TPM_CRB_CTRL_REQ
- * The device should respond within TIMEOUT_C by clearing the bit.
- * Anyhow, we do not wait here as a consequent CMD_READY request
- * will be handled correctly even if idle was not completed.
- *
- * The function does nothing for devices with ACPI-start method.
- *
- * Return: 0 always
- */
-static int __maybe_unused crb_go_idle(struct device *dev, struct crb_priv *priv)
-{
-	if (priv->flags & CRB_FL_ACPI_START)
-		return 0;
-
-	iowrite32(CRB_CTRL_REQ_GO_IDLE, &priv->cca->req);
-	/* we don't really care when this settles */
-
-	return 0;
-}
-
-/**
- * crb_cmd_ready - request tpm crb device to enter ready state
- *
- * @dev:  crb device
- * @priv: crb private data
- *
- * Write CRB_CTRL_REQ_CMD_READY to TPM_CRB_CTRL_REQ
- * and poll till the device acknowledge it by clearing the bit.
- * The device should respond within TIMEOUT_C.
- *
- * The function does nothing for devices with ACPI-start method
- *
- * Return: 0 on success -ETIME on timeout;
- */
-static int __maybe_unused crb_cmd_ready(struct device *dev,
-					struct crb_priv *priv)
-{
-	ktime_t stop, start;
-
-	if (priv->flags & CRB_FL_ACPI_START)
-		return 0;
-
-	iowrite32(CRB_CTRL_REQ_CMD_READY, &priv->cca->req);
-
-	start = ktime_get();
-	stop = ktime_add(start, ms_to_ktime(TPM2_TIMEOUT_C));
-	do {
-		if (!(ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY)) {
-			dev_dbg(dev, "cmdReady in %lld usecs\n",
-				ktime_to_us(ktime_sub(ktime_get(), start)));
-			return 0;
-		}
-		usleep_range(50, 100);
-	} while (ktime_before(ktime_get(), stop));
-
-	if (ioread32(&priv->cca->req) & CRB_CTRL_REQ_CMD_READY) {
-		dev_warn(dev, "cmdReady timed out\n");
-		return -ETIME;
-	}
-
-	return 0;
-}
+static SIMPLE_DEV_PM_OPS(crb_pm, tpm_pm_suspend, tpm_pm_resume);
 
 static u8 crb_status(struct tpm_chip *chip)
 {
@@ -264,6 +196,21 @@ static const struct tpm_class_ops tpm_crb = {
 	.req_complete_val = CRB_DRV_STS_COMPLETE,
 };
 
+static int crb_init(struct acpi_device *device, struct crb_priv *priv)
+{
+	struct tpm_chip *chip;
+
+	chip = tpmm_chip_alloc(&device->dev, &tpm_crb);
+	if (IS_ERR(chip))
+		return PTR_ERR(chip);
+
+	dev_set_drvdata(&chip->dev, priv);
+	chip->acpi_dev_handle = device->handle;
+	chip->flags = TPM_CHIP_FLAG_TPM2;
+
+	return tpm_chip_register(chip);
+}
+
 static int crb_check_resource(struct acpi_resource *ares, void *data)
 {
 	struct resource *io_res = data;
@@ -302,7 +249,6 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
 	struct list_head resources;
 	struct resource io_res;
 	struct device *dev = &device->dev;
-	u32 pa_high, pa_low;
 	u64 cmd_pa;
 	u32 cmd_size;
 	u64 rsp_pa;
@@ -330,27 +276,12 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
 	if (IS_ERR(priv->cca))
 		return PTR_ERR(priv->cca);
 
-	/*
-	 * PTT HW bug w/a: wake up the device to access
-	 * possibly not retained registers.
-	 */
-	ret = crb_cmd_ready(dev, priv);
-	if (ret)
-		return ret;
-
-	pa_high = ioread32(&priv->cca->cmd_pa_high);
-	pa_low  = ioread32(&priv->cca->cmd_pa_low);
-	cmd_pa = ((u64)pa_high << 32) | pa_low;
+	cmd_pa = ((u64) ioread32(&priv->cca->cmd_pa_high) << 32) |
+		  (u64) ioread32(&priv->cca->cmd_pa_low);
 	cmd_size = ioread32(&priv->cca->cmd_size);
-
-	dev_dbg(dev, "cmd_hi = %X cmd_low = %X cmd_size %X\n",
-		pa_high, pa_low, cmd_size);
-
 	priv->cmd = crb_map_res(dev, priv, &io_res, cmd_pa, cmd_size);
-	if (IS_ERR(priv->cmd)) {
-		ret = PTR_ERR(priv->cmd);
-		goto out;
-	}
+	if (IS_ERR(priv->cmd))
+		return PTR_ERR(priv->cmd);
 
 	memcpy_fromio(&rsp_pa, &priv->cca->rsp_pa, 8);
 	rsp_pa = le64_to_cpu(rsp_pa);
@@ -358,8 +289,7 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
 
 	if (cmd_pa != rsp_pa) {
 		priv->rsp = crb_map_res(dev, priv, &io_res, rsp_pa, rsp_size);
-		ret = PTR_ERR_OR_ZERO(priv->rsp);
-		goto out;
+		return PTR_ERR_OR_ZERO(priv->rsp);
 	}
 
 	/* According to the PTP specification, overlapping command and response
@@ -367,25 +297,18 @@ static int crb_map_io(struct acpi_device *device, struct crb_priv *priv,
 	 */
 	if (cmd_size != rsp_size) {
 		dev_err(dev, FW_BUG "overlapping command and response buffer sizes are not identical");
-		ret = -EINVAL;
-		goto out;
+		return -EINVAL;
 	}
-
 	priv->cmd_size = cmd_size;
 
 	priv->rsp = priv->cmd;
-
-out:
-	crb_go_idle(dev, priv);
-
-	return ret;
+	return 0;
 }
 
 static int crb_acpi_add(struct acpi_device *device)
 {
 	struct acpi_table_tpm2 *buf;
 	struct crb_priv *priv;
-	struct tpm_chip *chip;
 	struct device *dev = &device->dev;
 	acpi_status status;
 	u32 sm;
@@ -423,30 +346,7 @@ static int crb_acpi_add(struct acpi_device *device)
 	if (rc)
 		return rc;
 
-	chip = tpmm_chip_alloc(dev, &tpm_crb);
-	if (IS_ERR(chip))
-		return PTR_ERR(chip);
-
-	dev_set_drvdata(&chip->dev, priv);
-	chip->acpi_dev_handle = device->handle;
-	chip->flags = TPM_CHIP_FLAG_TPM2;
-
-	rc  = crb_cmd_ready(dev, priv);
-	if (rc)
-		return rc;
-
-	pm_runtime_set_active(dev);
-	pm_runtime_enable(dev);
-
-	rc = tpm_chip_register(chip);
-	if (rc) {
-		crb_go_idle(dev, priv);
-		pm_runtime_disable(dev);
-	}
-
-	pm_runtime_put(dev);
-
-	return rc;
+	return crb_init(device, priv);
 }
 
 static int crb_acpi_remove(struct acpi_device *device)
@@ -456,34 +356,9 @@ static int crb_acpi_remove(struct acpi_device *device)
 
 	tpm_chip_unregister(chip);
 
-	pm_runtime_disable(dev);
-
 	return 0;
 }
 
-#ifdef CONFIG_PM
-static int crb_pm_runtime_suspend(struct device *dev)
-{
-	struct tpm_chip *chip = dev_get_drvdata(dev);
-	struct crb_priv *priv = dev_get_drvdata(&chip->dev);
-
-	return crb_go_idle(dev, priv);
-}
-
-static int crb_pm_runtime_resume(struct device *dev)
-{
-	struct tpm_chip *chip = dev_get_drvdata(dev);
-	struct crb_priv *priv = dev_get_drvdata(&chip->dev);
-
-	return crb_cmd_ready(dev, priv);
-}
-#endif /* CONFIG_PM */
-
-static const struct dev_pm_ops crb_pm = {
-	SET_SYSTEM_SLEEP_PM_OPS(tpm_pm_suspend, tpm_pm_resume)
-	SET_RUNTIME_PM_OPS(crb_pm_runtime_suspend, crb_pm_runtime_resume, NULL)
-};
-
 static struct acpi_device_id crb_device_ids[] = {
 	{"MSFT0101", 0},
 	{"", 0},