tests: rtio: test rtio_sqe_prep_callback_no_cqe

Test that SQE's created with `rtio_sqe_prep_callback_no_cqe` run, but
don't create a completion queue event.

Signed-off-by: Jordan Yates <[email protected]>

tests/subsys/rtio/rtio_api/src/test_rtio_api.c

@@ -25,8 +25,8 @@
 #define MEM_BLK_SIZE 16
 #define MEM_BLK_ALIGN 4
 
-#define SQE_POOL_SIZE 4
-#define CQE_POOL_SIZE 4
+#define SQE_POOL_SIZE 5
+#define CQE_POOL_SIZE 5
 
 /*
  * Purposefully double the block count and half the block size. This leaves the same size mempool,
@@ -654,6 +654,7 @@ ZTEST(rtio_api, test_rtio_throughput)
 
 RTIO_DEFINE(r_callback_chaining, SQE_POOL_SIZE, CQE_POOL_SIZE);
 RTIO_IODEV_TEST_DEFINE(iodev_test_callback_chaining0);
+static bool cb_no_cqe_run;
 
 /**
  * Callback for testing with
@@ -663,6 +664,12 @@ void rtio_callback_chaining_cb(struct rtio *r, const struct rtio_sqe *sqe, void
 	TC_PRINT("chaining callback with userdata %p\n", arg0);
 }
 
+void rtio_callback_chaining_cb_no_cqe(struct rtio *r, const struct rtio_sqe *sqe, void *arg0)
+{
+	TC_PRINT("Chaining callback with userdata %p (No CQE)\n", arg0);
+	cb_no_cqe_run = true;
+}
+
 /**
  * @brief Test callback chaining requests
  *
@@ -696,6 +703,11 @@ void test_rtio_callback_chaining_(struct rtio *r)
 	rtio_sqe_prep_nop(sqe, &iodev_test_callback_chaining0, &userdata[2]);
 	sqe->flags |= RTIO_SQE_CHAINED;
 
+	sqe = rtio_sqe_acquire(r);
+	zassert_not_null(sqe, "Expected a valid sqe");
+	rtio_sqe_prep_callback_no_cqe(sqe, &rtio_callback_chaining_cb_no_cqe, sqe, NULL);
+	sqe->flags |= RTIO_SQE_CHAINED;
+
 	sqe = rtio_sqe_acquire(r);
 	zassert_not_null(sqe, "Expected a valid sqe");
 	rtio_sqe_prep_callback(sqe, &rtio_callback_chaining_cb, sqe, &userdata[3]);
@@ -706,6 +718,7 @@ void test_rtio_callback_chaining_(struct rtio *r)
 		 cq_count, atomic_get(&r->cq_count));
 	zassert_ok(res, "Should return ok from rtio_execute");
 	zassert_equal(atomic_get(&r->cq_count) - cq_count, 4, "Should have 4 pending completions");
+	zassert_true(cb_no_cqe_run, "Callback without CQE should have run");
 
 	for (int i = 0; i < 4; i++) {
 		TC_PRINT("consume %d\n", i);