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Tue, 17 Mar 2026 05:25:32 -0400 X-MC-Unique: GlVJTbV7Msyg99JQlEir9A-1 X-Mimecast-MFC-AGG-ID: GlVJTbV7Msyg99JQlEir9A_1773739529 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 3B05B19560A6; Tue, 17 Mar 2026 09:25:29 +0000 (UTC) Received: from [192.168.1.153] (unknown [10.45.224.69]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id CFCEE180035F; Tue, 17 Mar 2026 09:25:20 +0000 (UTC) From: Albert Esteve Date: Tue, 17 Mar 2026 10:24:44 +0100 Subject: [PATCH v6 4/5] drm: Suppress intentional warning backtraces in scaling unit tests Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260317-kunit_add_support-v6-4-dd22aeb3fe5d@redhat.com> References: <20260317-kunit_add_support-v6-0-dd22aeb3fe5d@redhat.com> In-Reply-To: <20260317-kunit_add_support-v6-0-dd22aeb3fe5d@redhat.com> To: Arnd Bergmann , Brendan Higgins , David Gow , Rae Moar , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jonathan Corbet , Shuah Khan Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, dri-devel@lists.freedesktop.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, Guenter Roeck , Linux Kernel Functional Testing , Dan Carpenter , =?utf-8?q?Ma=C3=ADra_Canal?= , Alessandro Carminati , Albert Esteve , Simona Vetter X-Developer-Signature: v=1; a=ed25519-sha256; t=1773739485; l=2672; i=aesteve@redhat.com; s=20260303; h=from:subject:message-id; bh=dgDPFwMzbwS7QQINim4WCBJEzudRgecx9bfpAoePY5M=; b=g94GzHpUTfjq+uP/n18WL3tY/0EmOZxMsmYqe2yh21ZXogKhGzdD7JUVOOcQsOQ4wJ8xZEjK8 uLc6BWvIL7gCWP9g0XqyuIm5TcTKkUMDArAaKE5AIPf4vgFzwaK/nQj X-Developer-Key: i=aesteve@redhat.com; a=ed25519; pk=YSFz6sOHd2L45+Fr8DIvHTi6lSIjhLZ5T+rkxspJt1s= X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 From: Guenter Roeck The drm_test_rect_calc_hscale and drm_test_rect_calc_vscale unit tests intentionally trigger warning backtraces by providing bad parameters to the tested functions. What is tested is the return value, not the existence of a warning backtrace. Suppress the backtraces to avoid clogging the kernel log and distraction from real problems. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Acked-by: Ma=C3=ADra Canal Cc: Maarten Lankhorst Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Guenter Roeck Signed-off-by: Alessandro Carminati Signed-off-by: Albert Esteve --- drivers/gpu/drm/tests/drm_rect_test.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/= drm_rect_test.c index 17e1f34b76101..867845e7d5ab6 100644 --- a/drivers/gpu/drm/tests/drm_rect_test.c +++ b/drivers/gpu/drm/tests/drm_rect_test.c @@ -406,22 +406,38 @@ KUNIT_ARRAY_PARAM(drm_rect_scale, drm_rect_scale_case= s, drm_rect_scale_case_desc =20 static void drm_test_rect_calc_hscale(struct kunit *test) { + KUNIT_DEFINE_SUPPRESSED_WARNING(drm_calc_scale); const struct drm_rect_scale_case *params =3D test->param_value; int scaling_factor; =20 + /* + * drm_rect_calc_hscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects all unit tests with an + * error code in expected_scaling_factor. + */ + KUNIT_START_SUPPRESSED_WARNING(drm_calc_scale); scaling_factor =3D drm_rect_calc_hscale(¶ms->src, ¶ms->dst, params->min_range, params->max_range); + KUNIT_END_SUPPRESSED_WARNING(drm_calc_scale); =20 KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } =20 static void drm_test_rect_calc_vscale(struct kunit *test) { + KUNIT_DEFINE_SUPPRESSED_WARNING(drm_calc_scale); const struct drm_rect_scale_case *params =3D test->param_value; int scaling_factor; =20 + /* + * drm_rect_calc_vscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects all unit tests with an + * error code in expected_scaling_factor. + */ + KUNIT_START_SUPPRESSED_WARNING(drm_calc_scale); scaling_factor =3D drm_rect_calc_vscale(¶ms->src, ¶ms->dst, params->min_range, params->max_range); + KUNIT_END_SUPPRESSED_WARNING(drm_calc_scale); =20 KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } --=20 2.52.0