diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 1fe9574b4a774549c24b20eeeae2b824af4ce9dc..0c14b195c0c25a4d5119bd72169216343367a4a8 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -425,10 +425,14 @@ static inline void blkcg_pin_online(struct blkcg *blkcg)
 static inline void blkcg_unpin_online(struct blkcg *blkcg)
 {
 	do {
+		struct blkcg *parent;
+
 		if (!refcount_dec_and_test(&blkcg->online_pin))
 			break;
+
+		parent = blkcg_parent(blkcg);
 		blkcg_destroy_blkgs(blkcg);
-		blkcg = blkcg_parent(blkcg);
+		blkcg = parent;
 	} while (blkcg);
 }