diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 860766421fe8a7c6200b4c1686ab1fe62a1a6ab9..0bf4c4c06b19648981dbea1909b725bde7559d0c 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1780,7 +1780,7 @@ int ext4_mb_get_buddy_cache_lock(struct super_block *sb, ext4_group_t group)
 		 * no block allocation going on in any
 		 * of that groups
 		 */
-		down_write(&grp->alloc_sem);
+		down_write_nested(&grp->alloc_sem, i);
 	}
 	return i;
 }