From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3A2C03F9F4D for ; Fri, 8 May 2026 15:03:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778252623; cv=none; b=g2ZetVEtImNTB+IhRe1dw5i64iX2jDVDl4i5bLvMR2SWQI3P3s6t7GEtYBeYCGMAk7RKxDZLRFA2D5c3AgnPaW3fwVfgszjAoxYlaLiLIOhl6AWCSVQH77nIGI7e5+LngDaoimposHHRzdXMfmsiljhpa9GsRnzqZ09BEofrJDc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778252623; c=relaxed/simple; bh=9Jr7X225ntyiXyFzcdBTfnRDfWaznp2nm4xcOiyEXNs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=jkJwXtuNkPU3Fay+aqCwheihlH7Bu00hXQWj88tJAQL38BqKEKfv2lN6/qNOwUM5JTXMJY5T7lY5KASwsG7TLwxZShhQFFRpI9hDX3mNSj8Sr3LcwtzgGgUjRzLzSUXNFSLy8JxHt1BBpt+kUMhSYoQmqHrAOCsOYrdJu4tFzUc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=ip1xIDxd; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ip1xIDxd" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1778252620; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=pTM5bDRFu2LnEWelZ4UVeTQriZB7mfNT46GLFzc2/xE=; b=ip1xIDxdv5dIenGbBZpuGs4XDiHqHX9BAhrIjHVIe5+xQbWWnLR6ZBh7NskL/DxV/eMjfB nfRKtv1DaLWqXZAH757RxjSqS6k3CYt30yVjiWTi7EC71F36B0wx6SHrz2VokKITkB8Fr6 NXiQk9FpWO3bsiNSKcIkj/8IfygvwhM= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-113-CspO-cBrOmeqIlR5CcKP1A-1; Fri, 08 May 2026 11:03:31 -0400 X-MC-Unique: CspO-cBrOmeqIlR5CcKP1A-1 X-Mimecast-MFC-AGG-ID: CspO-cBrOmeqIlR5CcKP1A_1778252605 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id BB9FC19560B7; Fri, 8 May 2026 15:03:24 +0000 (UTC) Received: from [192.168.1.153] (headnet01.pony-001.prod.iad2.dc.redhat.com [10.2.32.101]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id D8224180075F; Fri, 8 May 2026 15:03:17 +0000 (UTC) From: Albert Esteve Date: Fri, 08 May 2026 17:02:47 +0200 Subject: [PATCH v9 3/4] drm: Suppress intentional warning backtraces in scaling unit tests Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260508-kunit_add_support-v9-3-99df7aa880f6@redhat.com> References: <20260508-kunit_add_support-v9-0-99df7aa880f6@redhat.com> In-Reply-To: <20260508-kunit_add_support-v9-0-99df7aa880f6@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 , Andrew Morton , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti 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-riscv@lists.infradead.org, linux-doc@vger.kernel.org, peterz@infradead.org, Guenter Roeck , Linux Kernel Functional Testing , =?utf-8?q?Ma=C3=ADra_Canal?= , Alessandro Carminati , Albert Esteve , Dan Carpenter , Simona Vetter X-Developer-Signature: v=1; a=ed25519-sha256; t=1778252571; l=3273; i=aesteve@redhat.com; s=20260303; h=from:subject:message-id; bh=OzxKDl7juzBnGFv8nRO4KYyX446iqYsOHsLTSHCA/XY=; b=eRPZlXY0oZGNDAQpUv/i+XN1tRR4oFcuvNsNePj/TPFZTO4ljQZ5s0YOyA05Z0ONI4q4xTFKo R+2fJodStnmDnC9kzZ4GrIUOUC3P+HSFidoOMOuCg2vOOBDrpbup0Ao X-Developer-Key: i=aesteve@redhat.com; a=ed25519; pk=YSFz6sOHd2L45+Fr8DIvHTi6lSIjhLZ5T+rkxspJt1s= X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 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. Additionally, the suppression API allows to actually ensure a warning was triggered, without parsing any kernel logs and keeping them clean. Tested-by: Linux Kernel Functional Testing Acked-by: Dan Carpenter Acked-by: Maíra Canal Cc: Maarten Lankhorst Cc: David Airlie Cc: Daniel Vetter Signed-off-by: Guenter Roeck Signed-off-by: Alessandro Carminati Acked-by: David Gow Signed-off-by: Albert Esteve --- drivers/gpu/drm/tests/drm_rect_test.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c index 17e1f34b76101..809e73cb74498 100644 --- a/drivers/gpu/drm/tests/drm_rect_test.c +++ b/drivers/gpu/drm/tests/drm_rect_test.c @@ -407,10 +407,20 @@ KUNIT_ARRAY_PARAM(drm_rect_scale, drm_rect_scale_cases, drm_rect_scale_case_desc static void drm_test_rect_calc_hscale(struct kunit *test) { const struct drm_rect_scale_case *params = test->param_value; + int expected_warnings = params->expected_scaling_factor == -EINVAL; int scaling_factor; - scaling_factor = drm_rect_calc_hscale(¶ms->src, ¶ms->dst, - params->min_range, params->max_range); + /* + * drm_rect_calc_hscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects unit tests with -EINVAL + * error code in expected_scaling_factor. + */ + kunit_warning_suppress(test) { + scaling_factor = drm_rect_calc_hscale(¶ms->src, ¶ms->dst, + params->min_range, + params->max_range); + KUNIT_EXPECT_SUPPRESSED_WARNING_COUNT(test, expected_warnings); + } KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } @@ -418,10 +428,19 @@ static void drm_test_rect_calc_hscale(struct kunit *test) static void drm_test_rect_calc_vscale(struct kunit *test) { const struct drm_rect_scale_case *params = test->param_value; + int expected_warnings = params->expected_scaling_factor == -EINVAL; int scaling_factor; - scaling_factor = drm_rect_calc_vscale(¶ms->src, ¶ms->dst, - params->min_range, params->max_range); + /* + * drm_rect_calc_vscale() generates a warning backtrace whenever bad + * parameters are passed to it. This affects unit tests with -EINVAL + * error code in expected_scaling_factor. + */ + kunit_warning_suppress(test) { + scaling_factor = drm_rect_calc_vscale(¶ms->src, ¶ms->dst, + params->min_range, params->max_range); + KUNIT_EXPECT_SUPPRESSED_WARNING_COUNT(test, expected_warnings); + } KUNIT_EXPECT_EQ(test, scaling_factor, params->expected_scaling_factor); } -- 2.53.0