mei: me: fix reset state machine

ME HW ready bit is down after hw reset was asserted or on error.
Only on error we need to enter the reset flow, additional reset
need to be prevented when reset was triggered during
initialization , power up/down or a reset is already in progress

Tested-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index e4f8dec4dc3c..a0e19e61e7df 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -483,7 +483,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
         /* check if ME wants a reset */
         if (!mei_hw_is_ready(dev) &&
             dev->dev_state != MEI_DEV_RESETTING &&
-            dev->dev_state != MEI_DEV_INITIALIZING) {
+            dev->dev_state != MEI_DEV_INITIALIZING &&
+            dev->dev_state != MEI_DEV_POWER_DOWN &&
+            dev->dev_state != MEI_DEV_POWER_UP) {
                 dev_dbg(&dev->pdev->dev, "FW not ready.\n");
                 mei_reset(dev, 1);
                 mutex_unlock(&dev->device_lock);