diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index c58bf19a8a483..7789598eeb758 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4420,9 +4420,6 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
 	map = (struct map_lookup *)em->bdev;
 	offset = logical - em->start;
 
-	if (mirror_num > map->num_stripes)
-		mirror_num = 0;
-
 	stripe_len = map->stripe_len;
 	stripe_nr = offset;
 	/*