+ zblib_check_null_ret_error("service", service, FALSE);
+
+ /* Fetch private data */
+ priv_data = zblib_driver_ref_object(driver);
+ zblib_check_null_ret_error("priv_data", priv_data, FALSE);
+
+ ops = priv_data->ops;
+ zblib_check_null_ret_error("ops", ops, FALSE);