tests: rtio: iodev: fix: Add missing early return when error occurs

It appears this had not been exposed as the testsuite does not
exercise forcing errors for the IODEV. However, in the upcoming
testcase for error-handling of multi-shot items, it will be required.

Placed as standalone patch for the sake of clarity.

Signed-off-by: Luis Ubieda <[email protected]>

Author: ubieda

tests/subsys/rtio/rtio_api/src/rtio_iodev_test.h

@@ -64,6 +64,7 @@ static void rtio_iodev_test_complete(struct rtio_iodev_test_data *data, int stat
 	if (status < 0) {
 		rtio_iodev_sqe_err(data->txn_head, status);
 		rtio_iodev_test_next(data, true);
+		return;
 	}
 
 	data->txn_curr = rtio_txn_next(data->txn_curr);