[PATCH v2 3/3] drm/tests: managed: Add a simple test for drmm_managed_release

[Michał Winiarski]

Add a simple test that checks whether the action is indeed called right
away and that it is not called on the final drm_dev_put().

Signed-off-by: Michał Winiarski <michal.winiarski@xxxxxxxxx>
---
 drivers/gpu/drm/tests/drm_managed_test.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_managed_test.c b/drivers/gpu/drm/tests/drm_managed_test.c
index cabe6360aef71..8dfbea21c35c5 100644
--- a/drivers/gpu/drm/tests/drm_managed_test.c
+++ b/drivers/gpu/drm/tests/drm_managed_test.c
@@ -44,6 +44,29 @@ static void drm_test_managed_run_action(struct kunit *test)
 	KUNIT_EXPECT_GT(test, ret, 0);
 }
 
+static void drm_test_managed_release_action(struct kunit *test)
+{
+	struct managed_test_priv *priv = test->priv;
+	int ret;
+
+	ret = drmm_add_action_or_reset(&priv->drm, drm_action, priv);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+
+	ret = drm_dev_register(&priv->drm, 0);
+	KUNIT_ASSERT_EQ(test, ret, 0);
+
+	drmm_release_action(&priv->drm, drm_action, priv);
+	KUNIT_EXPECT_TRUE(test, priv->action_done);
+	priv->action_done = false;
+
+	drm_dev_unregister(&priv->drm);
+	drm_kunit_helper_free_device(test, priv->drm.dev);
+
+	ret = wait_event_interruptible_timeout(priv->action_wq, priv->action_done,
+					       msecs_to_jiffies(TEST_TIMEOUT_MS));
+	KUNIT_EXPECT_EQ(test, ret, 0);
+}
+
 static int drm_managed_test_init(struct kunit *test)
 {
 	struct managed_test_priv *priv;
@@ -65,6 +88,7 @@ static int drm_managed_test_init(struct kunit *test)
 
 static struct kunit_case drm_managed_tests[] = {
 	KUNIT_CASE(drm_test_managed_run_action),
+	KUNIT_CASE(drm_test_managed_release_action),
 	{}
 };
 
-- 
2.43.0