[PATCH] btrfs: Fix passing 0 to ERR_PTR in btrfs_search_dir_index_item()

[Yue Haibing]

Return NULL instead of passing to ERR_PTR while ret is zero, this fix
smatch warnings:

fs/btrfs/dir-item.c:353
 btrfs_search_dir_index_item() warn: passing zero to 'ERR_PTR'

Fixes: 9dcbe16fccbb ("btrfs: use btrfs_for_each_slot in btrfs_search_dir_index_item")
Signed-off-by: Yue Haibing <yuehaibing@xxxxxxxxxx>
---
 fs/btrfs/dir-item.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 001c0c2f872c..cdb30ec7366a 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -350,7 +350,7 @@ btrfs_search_dir_index_item(struct btrfs_root *root, struct btrfs_path *path,
 	if (ret > 0)
 		ret = 0;
 
-	return ERR_PTR(ret);
+	return ret ? ERR_PTR(ret) : NULL;
 }
 
 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
-- 
2.34.1