Btrfs: avoid positive number with ERR_PTR

inode_ref_info() returns 1 when the element wasn't found and < 0 on error,
just like btrfs_search_slot(). In iref_to_path() it's an error when the
inode ref can't be found, thus we return ERR_PTR(ret) in that case. In order
to avoid ERR_PTR(1), we now set ret to -ENOENT in that case.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 633c701a287d..98f6bf10bbd4 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -892,6 +892,8 @@ static char *iref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
                 if (eb != eb_in)
                         free_extent_buffer(eb);
                 ret = inode_ref_info(parent, 0, fs_root, path, &found_key);
+                if (ret > 0)
+                        ret = -ENOENT;
                 if (ret)
                         break;
                 next_inum = found_key.offset;