linux-kernel - [PATCH 1/4] drm/vc4: tests: Use return instead of assert

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Message-Id: <20250318-drm-vc4-kunit-failures-v1-1-779864d9ab37@kernel.org>
Date: Tue, 18 Mar 2025 15:17:37 +0100
From: Maxime Ripard <mripard@...nel.org>
To: Dave Stevenson <dave.stevenson@...pberrypi.com>, 
 Maíra Canal <mcanal@...lia.com>, 
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
 Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Maxime Ripard <mripard@...nel.org>
Subject: [PATCH 1/4] drm/vc4: tests: Use return instead of assert

The vc4_mock_atomic_add_output() and vc4_mock_atomic_del_output() assert
that the functions they are calling didn't fail. Since some of them can
return EDEADLK, we can't properly deal with it.

Since both functions are expected to return an int, and all caller check
the return value, let's just properly propagate the errors when they
occur.

Fixes: f759f5b53f1c ("drm/vc4: tests: Introduce a mocking infrastructure")
Fixes: 76ec18dc5afa ("drm/vc4: tests: Add unit test suite for the PV muxing")
Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
 drivers/gpu/drm/vc4/tests/vc4_mock_output.c | 36 +++++++++++++++++++----------
 1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/vc4/tests/vc4_mock_output.c b/drivers/gpu/drm/vc4/tests/vc4_mock_output.c
index e70d7c3076acf168782c48301f3b3dfb9be21f22..f0ddc223c1f839e8a14f37fdcbb72e7b2c836aa1 100644
--- a/drivers/gpu/drm/vc4/tests/vc4_mock_output.c
+++ b/drivers/gpu/drm/vc4/tests/vc4_mock_output.c
@@ -73,28 +73,34 @@ int vc4_mock_atomic_add_output(struct kunit *test,
 	struct drm_encoder *encoder;
 	struct drm_crtc *crtc;
 	int ret;
 
 	encoder = vc4_find_encoder_by_type(drm, type);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, encoder);
+	if (!encoder)
+		return -ENODEV;
 
 	crtc = vc4_find_crtc_for_encoder(test, drm, encoder);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc);
+	if (!crtc)
+		return -ENODEV;
 
 	output = encoder_to_vc4_dummy_output(encoder);
 	conn = &output->connector;
 	conn_state = drm_atomic_get_connector_state(state, conn);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
+	if (IS_ERR(conn_state))
+		return PTR_ERR(conn_state);
 
 	ret = drm_atomic_set_crtc_for_connector(conn_state, crtc);
-	KUNIT_EXPECT_EQ(test, ret, 0);
+	if (ret)
+		return ret;
 
 	crtc_state = drm_atomic_get_crtc_state(state, crtc);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
 
 	ret = drm_atomic_set_mode_for_crtc(crtc_state, &default_mode);
-	KUNIT_EXPECT_EQ(test, ret, 0);
+	if (ret)
+		return ret;
 
 	crtc_state->active = true;
 
 	return 0;
 }
@@ -111,28 +117,34 @@ int vc4_mock_atomic_del_output(struct kunit *test,
 	struct drm_encoder *encoder;
 	struct drm_crtc *crtc;
 	int ret;
 
 	encoder = vc4_find_encoder_by_type(drm, type);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, encoder);
+	if (!encoder)
+		return -ENODEV;
 
 	crtc = vc4_find_crtc_for_encoder(test, drm, encoder);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc);
+	if (!crtc)
+		return -ENODEV;
 
 	crtc_state = drm_atomic_get_crtc_state(state, crtc);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, crtc_state);
+	if (IS_ERR(crtc_state))
+		return PTR_ERR(crtc_state);
 
 	crtc_state->active = false;
 
 	ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL);
-	KUNIT_ASSERT_EQ(test, ret, 0);
+	if (ret)
+		return ret;
 
 	output = encoder_to_vc4_dummy_output(encoder);
 	conn = &output->connector;
 	conn_state = drm_atomic_get_connector_state(state, conn);
-	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, conn_state);
+	if (IS_ERR(conn_state))
+		return PTR_ERR(conn_state);
 
 	ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
-	KUNIT_ASSERT_EQ(test, ret, 0);
+	if (ret)
+		return ret;
 
 	return 0;
 }

-- 
2.48.1