linux-kernel - Re: [PATCH AUTOSEL 5.13 001/189] drm/etnaviv: fix NULL check before some freeing functions is not needed

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Date:   Wed, 14 Jul 2021 12:45:57 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     Christian König <christian.koenig@....com>
Cc:     Lucas Stach <l.stach@...gutronix.de>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Tian Tao <tiantao6@...ilicon.com>,
        etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH AUTOSEL 5.13 001/189] drm/etnaviv: fix NULL check before
 some freeing functions is not needed

On Wed, Jul 07, 2021 at 01:50:21PM +0200, Christian König wrote:
>
>
>Am 07.07.21 um 12:52 schrieb Lucas Stach:
>>Am Dienstag, dem 06.07.2021 um 07:11 -0400 schrieb Sasha Levin:
>>>From: Tian Tao <tiantao6@...ilicon.com>
>>>
>>>[ Upstream commit 7d614ab2f20503ed8766363d41f8607337571adf ]
>>>
>>>fixed the below warning:
>>>drivers/gpu/drm/etnaviv/etnaviv_gem_prime.c:84:2-8: WARNING: NULL check
>>>before some freeing functions is not needed.
>>While the subject contains "fix" this only removes a duplicated NULL
>>check, so the code is correct before and after this change.
>>Is this really stable material? Doesn't this just add commit noise to
>>the stable kernels?
>
>Yeah, agree.
>
>I also had a case where a NULL check was removed in amdgpu and then a 
>bit later back ported to stable.
>
>Maybe just use something like "remove superfluous NULL check".

Sorry for missing that, I'll drop it. Thanks!

-- 
Thanks,
Sasha