mei: check whether hw start has succeeded

hw start may fail therefore the reset flow has
to check for the return value

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

2 files changed, 8 insertions, 3 deletions

diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 15253886f37e..6fc573cef178 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -181,7 +181,12 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
                 return;
         }
 
-        mei_hw_start(dev);
+        ret = mei_hw_start(dev);
+        if (ret) {
+                dev_err(&dev->pdev->dev, "hw_start failed disabling the device\n");
+                dev->dev_state = MEI_DEV_DISABLED;
+                return;
+        }
 
         dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
         /* link is established * start sending messages.  */
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 1aa499782abe..7b918b2fb894 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -544,9 +544,9 @@ static inline int mei_hw_reset(struct mei_device *dev, bool enable)
         return dev->ops->hw_reset(dev, enable);
 }
 
-static inline void mei_hw_start(struct mei_device *dev)
+static inline int mei_hw_start(struct mei_device *dev)
 {
-        dev->ops->hw_start(dev);
+        return dev->ops->hw_start(dev);
 }
 
 static inline void mei_clear_interrupts(struct mei_device *dev)