redonkable/alistair23-linux
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mei: me: fix reset state machine

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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>
This commit is contained in:
Tomas Winkler 2013-07-17 15:13:15 +03:00 committed by Greg Kroah-Hartman
parent 9310f61a94
commit 315a383ad7
1 changed files with 3 additions and 1 deletions
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4
drivers/misc/mei/hw-me.c
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@ -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);