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mtd: blktrans: fix a race vs kthread_stop

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There is small race window that could make kthread_stop hang forever.
I found that while hacking the IR subsystem.

Signed-off-by: Maxim Levitsky <maximlevisky@gmail.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Maxim Levitsky 2010-10-15 17:20:45 +02:00 • committed by David Woodhouse
parent 480792b7bf
commit 12aebf3e1a
1 changed files with 4 additions and 0 deletions
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4
drivers/mtd/mtd_blkdevs.c
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@ -133,6 +133,10 @@ static int mtd_blktrans_thread(void *arg)
if (!req && !(req = blk_fetch_request(rq))) {
set_current_state(TASK_INTERRUPTIBLE);
if (kthread_should_stop())
set_current_state(TASK_RUNNING);
spin_unlock_irq(rq->queue_lock);
schedule();
spin_lock_irq(rq->queue_lock);