fixup! drivers: can: remove run-time RTR filtering, add build-time RT…

…R filter

tests/drivers/can/api/src/classic.c

@@ -406,7 +406,14 @@ void send_receive_rtr(const struct can_filter *filter,
 	zassert_true(filter_id >= 0, "negative filter number");
 
 	/* Verify that filter matches RTR frame */
-	send_test_frame(can_dev, rtr_frame);
+	err = can_send(can_dev, rtr_frame, TEST_SEND_TIMEOUT, NULL, NULL);
+	if (err == -ENOTSUP) {
+		/* Not all drivers support transmission of RTR frames */
+		can_remove_rx_filter(can_dev, filter_id);
+		ztest_test_skip();
+	}
+	zassert_equal(err, 0, "failed to send RTR frame (err %d)", err);
+
 	err = k_msgq_get(&can_msgq, &frame, TEST_RECEIVE_TIMEOUT);
 	zassert_equal(err, 0, "receive timeout");
 	assert_frame_equal(&frame, rtr_frame, 0);
@@ -752,7 +759,14 @@ ZTEST_USER(can_classic, test_reject_std_id_rtr)
 	Z_TEST_SKIP_IFDEF(CONFIG_CAN_ACCEPT_RTR);
 
 	filter_id = add_rx_msgq(can_dev, &test_std_filter_1);
-	send_test_frame(can_dev, &test_std_rtr_frame_1);
+
+	err = can_send(can_dev, &test_std_rtr_frame_1, TEST_SEND_TIMEOUT, NULL, NULL);
+	if (err == -ENOTSUP) {
+		/* Not all drivers support transmission of RTR frames */
+		can_remove_rx_filter(can_dev, filter_id);
+		ztest_test_skip();
+	}
+	zassert_equal(err, 0, "failed to send RTR frame (err %d)", err);
 
 	err = k_msgq_get(&can_msgq, &frame_buffer, TEST_RECEIVE_TIMEOUT);
 	zassert_equal(err, -EAGAIN, "received a frame that should be rejected");
@@ -772,7 +786,14 @@ ZTEST_USER(can_classic, test_reject_ext_id_rtr)
 	Z_TEST_SKIP_IFDEF(CONFIG_CAN_ACCEPT_RTR);
 
 	filter_id = add_rx_msgq(can_dev, &test_ext_filter_1);
-	send_test_frame(can_dev, &test_ext_rtr_frame_1);
+
+	err = can_send(can_dev, &test_ext_rtr_frame_1, TEST_SEND_TIMEOUT, NULL, NULL);
+	if (err == -ENOTSUP) {
+		/* Not all drivers support transmission of RTR frames */
+		can_remove_rx_filter(can_dev, filter_id);
+		ztest_test_skip();
+	}
+	zassert_equal(err, 0, "failed to send RTR frame (err %d)", err);
 
 	err = k_msgq_get(&can_msgq, &frame_buffer, TEST_RECEIVE_TIMEOUT);
 	zassert_equal(err, -EAGAIN, "received a frame that should be rejected");