1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f8b906843926..f013d3662665 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -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)