cifs: fix renaming one hardlink on top of another

cifs: fix renaming one hardlink on top of another

POSIX says that renaming one hardlink on top of another to the same
inode is a no-op. We had the logic mostly right, but forgot to clear
the return code.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index d54fa8aeaea9..ff8c68de4a92 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1361,9 +1361,11 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 
                 if (tmprc == 0 && (info_buf_source->UniqueId ==
-                                   info_buf_target->UniqueId))
+                                   info_buf_target->UniqueId)) {
                         /* same file, POSIX says that this is a noop */
+                        rc = 0;
                         goto cifs_rename_exit;
+                }
         } /* else ... BB we could add the same check for Windows by
                      checking the UniqueId via FILE_INTERNAL_INFO */