[PATCH] fs: ntfs: super: added return error value while map failed

[lijian_8010a29]

From: lijian <lijian@xxxxxxxxxx>

When lookup_extent_mapping failed, should return '-ENOENT'.

Signed-off-by: lijian <lijian@xxxxxxxxxx>
---
 fs/btrfs/extent_map.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index 4a8e02f7b6c7..e9d9f2bfc11d 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -305,8 +305,10 @@ int unpin_extent_cache(struct extent_map_tree *tree, u64 start, u64 len,
 
 	WARN_ON(!em || em->start != start);
 
-	if (!em)
+	if (!em) {
+		ret = -ENOENT;
 		goto out;
+	}
 
 	em->generation = gen;
 	clear_bit(EXTENT_FLAG_PINNED, &em->flags);
-- 
2.17.1