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mei: wd: decouple and revamp watchdog state machine

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Before ME watchdog was exported through standard watchdog interface
it was closed and started together with the mei device.

The major issue is that closing ME watchdog disabled also MEI device,
to fix this the watchdog state machine has to be independent from MEI
state machine.

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
2012-08-16 19:39:43 +03:00
committed by Greg Kroah-Hartman
parent 248ffdf7c9
commit c216fdeb2e
6 changed files with 34 additions and 27 deletions
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9
drivers/misc/mei/main.c
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@@ -1060,7 +1060,9 @@ static void __devexit mei_remove(struct pci_dev *pdev)
mutex_lock(&dev->device_lock);
mei_wd_stop(dev, false);
cancel_delayed_work(&dev->timer_work);
mei_wd_stop(dev);
mei_device = NULL;
@@ -1115,8 +1117,11 @@ static int mei_pci_suspend(struct device *device)
if (!dev)
return -ENODEV;
mutex_lock(&dev->device_lock);
cancel_delayed_work(&dev->timer_work);
/* Stop watchdog if exists */
err = mei_wd_stop(dev, true);
err = mei_wd_stop(dev);
/* Set new mei state */
if (dev->dev_state == MEI_DEV_ENABLED ||
dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET) {