mei: me: fix reset state machine

commit 315a383ad7dbd484fafb93ef08038e3dbafbb7a8 upstream.

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>

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 822170f00348df63b2a180aa157f08a0496ca27e..03108591c139a1ef2900988189df9fd4ec2d3d41 100644 (file)
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -482,7 +482,9 @@ 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);