diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 9567a9c83a1fc6e178363765ad90e049c06df320..befadb41a11f0c77bf68cd7bda5af1dd7ffef785 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -606,6 +606,12 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 					 * a chance*/
 					md_check_recovery(conf->mddev);
 				}
+				/*
+				 * Because md_wait_for_blocked_rdev
+				 * will dec nr_pending, we must
+				 * increment it first.
+				 */
+				atomic_inc(&rdev->nr_pending);
 				md_wait_for_blocked_rdev(rdev, conf->mddev);
 			} else {
 				/* Acknowledged bad block - skip the write */