[PATCH v3 3/7] drm/sched/tests: Add unit test for cancel_job()

[Philipp Stanner]

The scheduler unit tests now provide a new callback, cancel_job(). This
callback gets used by drm_sched_fini() for all still pending jobs to
cancel them.

Implement a new unit test to test this.

Signed-off-by: Philipp Stanner <pha...@kernel.org>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursu...@igalia.com>
---
 drivers/gpu/drm/scheduler/tests/tests_basic.c | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/drivers/gpu/drm/scheduler/tests/tests_basic.c 
b/drivers/gpu/drm/scheduler/tests/tests_basic.c
index 7230057e0594..b1ae10c6bb37 100644
--- a/drivers/gpu/drm/scheduler/tests/tests_basic.c
+++ b/drivers/gpu/drm/scheduler/tests/tests_basic.c
@@ -204,6 +204,47 @@ static struct kunit_suite drm_sched_basic = {
        .test_cases = drm_sched_basic_tests,
 };
 
+static void drm_sched_basic_cancel(struct kunit *test)
+{
+       struct drm_mock_sched_entity *entity;
+       struct drm_mock_scheduler *sched;
+       struct drm_mock_sched_job *job;
+       bool done;
+
+       /*
+        * Check that drm_sched_fini() uses the cancel_job() callback to cancel
+        * jobs that are still pending.
+        */
+
+       sched = drm_mock_sched_new(test, MAX_SCHEDULE_TIMEOUT);
+       entity = drm_mock_sched_entity_new(test, DRM_SCHED_PRIORITY_NORMAL,
+                                          sched);
+
+       job = drm_mock_sched_job_new(test, entity);
+
+       drm_mock_sched_job_submit(job);
+
+       done = drm_mock_sched_job_wait_scheduled(job, HZ);
+       KUNIT_ASSERT_TRUE(test, done);
+
+       drm_mock_sched_entity_free(entity);
+       drm_mock_sched_fini(sched);
+
+       KUNIT_ASSERT_EQ(test, job->hw_fence.error, -ECANCELED);
+}
+
+static struct kunit_case drm_sched_cancel_tests[] = {
+       KUNIT_CASE(drm_sched_basic_cancel),
+       {}
+};
+
+static struct kunit_suite drm_sched_cancel = {
+       .name = "drm_sched_basic_cancel_tests",
+       .init = drm_sched_basic_init,
+       .exit = drm_sched_basic_exit,
+       .test_cases = drm_sched_cancel_tests,
+};
+
 static void drm_sched_basic_timeout(struct kunit *test)
 {
        struct drm_mock_scheduler *sched = test->priv;
@@ -471,6 +512,7 @@ static struct kunit_suite drm_sched_credits = {
 
 kunit_test_suites(&drm_sched_basic,
                  &drm_sched_timeout,
+                 &drm_sched_cancel,
                  &drm_sched_priority,
                  &drm_sched_modify_sched,
                  &drm_sched_credits);
-- 
2.49.0