From 77537ad2917bbca0a73ee6ebd44fc0ce5416d590 Mon Sep 17 00:00:00 2001
From: Alexander Usyskin <alexander.usyskin@intel.com>
Date: Thu, 16 Jun 2016 17:58:52 +0300
Subject: mei: recover after errors in runtime pm flow

Schedule link reset if failed to perform runtime suspend or resume.
Set active runtime pm stte on link reset
to clean runtimr pm error, if present.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index e2fb44c..c2d70d2 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -18,6 +18,7 @@
 
 #include <linux/kthread.h>
 #include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
 
 #include "mei_dev.h"
 #include "hbm.h"
@@ -1063,6 +1064,8 @@ static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
 		}
 	}
 
+	pm_runtime_set_active(dev->dev);
+
 	hcsr = mei_hcsr_read(dev);
 	/* H_RST may be found lit before reset is started,
 	 * for example if preceding reset flow hasn't completed.
diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c
index 4a6c1b8..e6e5e55 100644
--- a/drivers/misc/mei/hw-txe.c
+++ b/drivers/misc/mei/hw-txe.c
@@ -20,6 +20,7 @@
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/irqreturn.h>
+#include <linux/pm_runtime.h>
 
 #include <linux/mei.h>
 
@@ -935,6 +936,8 @@ static int mei_txe_hw_start(struct mei_device *dev)
 		return ret;
 	}
 
+	pm_runtime_set_active(dev->dev);
+
 	/* enable input ready interrupts:
 	 * SEC_IPC_HOST_INT_MASK.IPC_INPUT_READY_INT_MASK
 	 */
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 64e64da..718addf 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -400,6 +400,9 @@ static int mei_me_pm_runtime_suspend(struct device *device)
 
 	dev_dbg(&pdev->dev, "rpm: me: runtime suspend ret=%d\n", ret);
 
+	if (ret && ret != -EAGAIN)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }
 
@@ -423,6 +426,9 @@ static int mei_me_pm_runtime_resume(struct device *device)
 
 	dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret);
 
+	if (ret)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }
 
diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c
index 30cc306..58ffd30 100644
--- a/drivers/misc/mei/pci-txe.c
+++ b/drivers/misc/mei/pci-txe.c
@@ -347,6 +347,10 @@ static int mei_txe_pm_runtime_suspend(struct device *device)
 	dev_dbg(&pdev->dev, "rpm: txe: runtime suspend ret=%d\n", ret);
 
 	mutex_unlock(&dev->device_lock);
+
+	if (ret && ret != -EAGAIN)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }
 
@@ -372,6 +376,9 @@ static int mei_txe_pm_runtime_resume(struct device *device)
 
 	dev_dbg(&pdev->dev, "rpm: txe: runtime resume ret = %d\n", ret);
 
+	if (ret)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }
 
-- 
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