diff --git a/[refs] b/[refs]
index 704a60aed4d0..0a85da8cdc7d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ed209584c38fb74b7eecc03e5b1bfe674e591bd8
+refs/heads/master: 30b8aa9172dfeaac6d77897c67ee9f9fc574cdbb
diff --git a/trunk/drivers/md/md.c b/trunk/drivers/md/md.c
index 8beb19c3bb44..477eb2e180c0 100644
--- a/trunk/drivers/md/md.c
+++ b/trunk/drivers/md/md.c
@@ -8140,7 +8140,8 @@ static int md_notify_reboot(struct notifier_block *this,
 
 	for_each_mddev(mddev, tmp) {
 		if (mddev_trylock(mddev)) {
-			__md_stop_writes(mddev);
+			if (mddev->pers)
+				__md_stop_writes(mddev);
 			mddev->safemode = 2;
 			mddev_unlock(mddev);
 		}