Commit ad4068de authored Nov 14, 2013 by majianpeng Committed by NeilBrown Nov 14, 2013

raid5: Use slow_path to release stripe when mddev->thread is null



When release_stripe() is called in grow_one_stripe(), the
mddev->thread is null. So it will omit one wakeup this thread to
release stripe.
For this condition, use slow_path to release stripe.

Bug was introduced in 3.12

Cc: stable@vger.kernel.org (3.12+)
Fixes: 773ca82f
Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>

parent 39cf275a

drivers/md/raid5.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -340,7 +340,8 @@ static void release_stripe(struct stripe_head *sh)
		unsigned long flags;
		bool wakeup;

		if (test_and_set_bit(STRIPE_ON_RELEASE_LIST, &sh->state))
		if (unlikely(!conf->mddev->thread) \|\|
		test_and_set_bit(STRIPE_ON_RELEASE_LIST, &sh->state))
		goto slow_path;
		wakeup = llist_add(&sh->release_list, &conf->released_stripes);
		if (wakeup)