linux-kernel - Re: [PATCH] drm/ssd130x: Fix possible uninitialized usage of crtc

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Date:   Tue, 31 Oct 2023 11:11:24 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Jocelyn Falempe <jfalempe@...hat.com>,
        linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <mripard@...nel.org>,
        dri-devel@...ts.freedesktop.org,
        Dan Carpenter <dan.carpenter@...aro.org>
Subject: Re: [PATCH] drm/ssd130x: Fix possible uninitialized usage of
 crtc_state variable

Geert Uytterhoeven <geert@...ux-m68k.org> writes:

Hello Geert,

> Hi Javier,
>
> On Fri, Oct 27, 2023 at 11:33 AM Javier Martinez Canillas
> <javierm@...hat.com> wrote:
>> Jocelyn Falempe <jfalempe@...hat.com> writes:
>> > On 21/10/2023 00:52, Javier Martinez Canillas wrote:
>> >> Avoid a possible uninitialized use of the crtc_state variable in function
>> >> ssd132x_primary_plane_atomic_check() and avoid the following Smatch warn:
>> >>
>> >>      drivers/gpu/drm/solomon/ssd130x.c:921 ssd132x_primary_plane_atomic_check()
>> >>      error: uninitialized symbol 'crtc_state'.
>> >
>> > That looks trivial, so you can add:
>> >
>> > Acked-by: Jocelyn Falempe <jfalempe@...hat.com>
>> >
>>
>> Pushed to drm-misc (drm-misc-next). Thanks!
>
> Looks like you introduced an unintended
>
>     (cherry picked from commit 9e4db199e66d427c50458f4d72734cc4f0b92948)
>
> ?
>

No, that's intended. It's added by the `dim cherry-pick` command, since I
had to cherry-pick to drm-misc-next-fixes the commit that was already in
the drm-misc-next branch.

You will find that message in many drm commits, i.e:

$ git log --oneline --grep="(cherry picked from commit" drivers/gpu/drm/ | wc -l
1708

> Gr{oetje,eeting}s,
>

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat