diff --git a/drivers/md/md.c b/drivers/md/md.c
index 9fd4dbe..480f658 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -1798,6 +1798,8 @@
 				goto out;
 			mddev->ro = 1;
 		} else {
+			bitmap_flush(mddev);
+			wait_event(mddev->sb_wait, atomic_read(&mddev->pending_writes)==0);
 			if (mddev->ro)
 				set_disk_ro(disk, 0);
 			blk_queue_make_request(mddev->queue, md_fail_request);