commit 77537ad2917bbca0a73ee6ebd44fc0ce5416d590
author Alexander Usyskin <alexander.usyskin@intel.com> Thu Jun 16 17:58:52 2016 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> Tue Aug 30 14:36:39 2016 +0200
tree c9bd6250496ac139ed82e9639c6ea7dd70aa8168
parent aab3b1a34ae376a80ebb05a217d950df13db5156

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>

drivers/misc/mei/hw-me.c

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 @@
 		}
 	}
 
+	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.

drivers/misc/mei/hw-txe.c

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 @@
 		return ret;
 	}
 
+	pm_runtime_set_active(dev->dev);
+
 	/* enable input ready interrupts:
 	 * SEC_IPC_HOST_INT_MASK.IPC_INPUT_READY_INT_MASK
 	 */

drivers/misc/mei/pci-me.c

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 @@
 
 	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 @@
 
 	dev_dbg(&pdev->dev, "rpm: me: runtime resume ret = %d\n", ret);
 
+	if (ret)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }
 

drivers/misc/mei/pci-txe.c

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 @@
 	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 @@
 
 	dev_dbg(&pdev->dev, "rpm: txe: runtime resume ret = %d\n", ret);
 
+	if (ret)
+		schedule_work(&dev->reset_work);
+
 	return ret;
 }