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mei: do not overwrite state on hw start

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During the hardware start sequence, do not overwrite the driver state
and do not proceed with the initialization sequence if the state
was changed while the driver was waiting for the start interrupt.

This can happen if the driver's removal/stop procedure was triggered
from the parent level while the driver is waiting for the start
interrupt. This may lead to stray the reset work or the timer
after driver were removed.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-4-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Usyskin 2022-02-15 10:04:38 +02:00 committed by Greg Kroah-Hartman
parent 04af137c6a
commit 2be483f12e
1 changed files with 5 additions and 0 deletions
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5
drivers/misc/mei/init.c
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@ -161,6 +161,11 @@ int mei_reset(struct mei_device *dev)
return ret;
}
if (dev->dev_state != MEI_DEV_RESETTING) {
dev_dbg(dev->dev, "wrong state = %d on link start\n", dev->dev_state);
return 0;
}
dev_dbg(dev->dev, "link is established start sending messages.\n");
mei_set_devstate(dev, MEI_DEV_INIT_CLIENTS);