diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index edda9ea..bd112c8 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -949,7 +949,7 @@
 	lo->lo_state = Lo_unbound;
 	/* This is safe: open() is still holding a reference. */
 	module_put(THIS_MODULE);
-	if (max_part > 0)
+	if (max_part > 0 && bdev)
 		ioctl_by_bdev(bdev, BLKRRPART, 0);
 	mutex_unlock(&lo->lo_ctl_mutex);
 	/*