xfs: xfs_dir_fsync() returns positive errno

And it should be negative.
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by: NJie Liu <jeff.liu@oracle.com>
Signed-off-by: NDave Chinner <david@fromorbit.com>

fs/xfs/xfs_file.c

@@ -155,7 +155,7 @@ xfs_dir_fsync(
 
 	if (!lsn)
 		return 0;
-	return _xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
+	return -_xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
 }
 
 STATIC int