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Message-ID: <7f6a223f-f432-4e1b-a67e-3816448224a1@igalia.com>
Date: Mon, 25 Mar 2024 22:09:31 -0300
From: Maíra Canal <mcanal@...lia.com>
To: Guenter Roeck <linux@...ck-us.net>
Cc: linux-kselftest@...r.kernel.org, David Airlie <airlied@...il.com>,
Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>,
Kees Cook <keescook@...omium.org>, Daniel Diaz <daniel.diaz@...aro.org>,
David Gow <davidgow@...gle.com>, Arthur Grillo <arthurgrillo@...eup.net>,
Brendan Higgins <brendan.higgins@...ux.dev>,
Naresh Kamboju <naresh.kamboju@...aro.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Andrew Morton <akpm@...ux-foundation.org>, Maxime Ripard
<mripard@...nel.org>, Ville Syrjälä
<ville.syrjala@...ux.intel.com>, Daniel Vetter <daniel@...ll.ch>,
Thomas Zimmermann <tzimmermann@...e.de>, dri-devel@...ts.freedesktop.org,
kunit-dev@...glegroups.com, linux-arch@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-parisc@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org,
linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
loongarch@...ts.linux.dev, netdev@...r.kernel.org,
Linux Kernel Functional Testing <lkft@...aro.org>
Subject: Re: [PATCH v2 05/14] drm: Suppress intentional warning backtraces in
scaling unit tests
On 3/25/24 16:24, Guenter Roeck wrote:
> Hi,
>
> On Mon, Mar 25, 2024 at 04:05:06PM -0300, Maíra Canal wrote:
>> Hi Guenter,
>>
>> On 3/25/24 14:52, Guenter Roeck wrote:
>>> 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.
>>>
>>> Tested-by: Linux Kernel Functional Testing <lkft@...aro.org>
>>> Acked-by: Dan Carpenter <dan.carpenter@...aro.org>
>>> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
>>> ---
>>> - Rebased to v6.9-rc1
>>> - Added Tested-by:, Acked-by:, and Reviewed-by: tags
>>>
>>> drivers/gpu/drm/tests/drm_rect_test.c | 6 ++++++
>>> 1 file changed, 6 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/tests/drm_rect_test.c b/drivers/gpu/drm/tests/drm_rect_test.c
>>> index 76332cd2ead8..75614cb4deb5 100644
>>> --- a/drivers/gpu/drm/tests/drm_rect_test.c
>>> +++ b/drivers/gpu/drm/tests/drm_rect_test.c
>>> @@ -406,22 +406,28 @@ 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)
>>> {
>>> + DEFINE_SUPPRESSED_WARNING(drm_calc_scale);
>>> const struct drm_rect_scale_case *params = test->param_value;
>>> int scaling_factor;
>>> + START_SUPPRESSED_WARNING(drm_calc_scale);
>>
>> I'm not sure if it is not that obvious only to me, but it would be nice
>> to have a comment here, remembering that we provide bad parameters in
>> some test cases.
>
> Sure. Something like this ?
>
> /*
> * 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.
> */
>
Yeah, perfect. With that, feel free to add my
Acked-by: Maíra Canal <mcanal@...lia.com>
Best Regards,
- Maíra
> Thanks,
> Guenter
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