Re: [git pull] drm fixes for 5.11-rc1

From: Rodrigo Siqueira
Date: Tue Dec 29 2020 - 12:02:19 EST


Hi,

This patch should fix the issue:

https://patchwork.freedesktop.org/patch/410754/?series=85303&rev=1

Thanks

On 12/29, R, Bindu wrote:
> [AMD Official Use Only - Internal Distribution Only]
>
> ++Siqueira.
> Regards,
> Bindu
>
> ══════════════════════════════════════════════════════════════════════════
>
> From: Alex Deucher <alexdeucher@xxxxxxxxx>
> Sent: Tuesday, December 29, 2020 10:07 AM
> To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>; Wentland, Harry
> <Harry.Wentland@xxxxxxx>; Kazlauskas, Nicholas
> <Nicholas.Kazlauskas@xxxxxxx>; Wu, Hersen <hersenxs.wu@xxxxxxx>
> Cc: Dave Airlie <airlied@xxxxxxxxx>; Pavic, Josip <Josip.Pavic@xxxxxxx>;
> R, Bindu <Bindu.R@xxxxxxx>; Deucher, Alexander
> <Alexander.Deucher@xxxxxxx>; Daniel Vetter <daniel.vetter@xxxxxxxx>; LKML
> <linux-kernel@xxxxxxxxxxxxxxx>; dri-devel
> <dri-devel@xxxxxxxxxxxxxxxxxxxxx>
> Subject: Re: [git pull] drm fixes for 5.11-rc1
>  
> On Thu, Dec 24, 2020 at 5:28 PM Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On Wed, Dec 23, 2020 at 6:29 PM Dave Airlie <airlied@xxxxxxxxx> wrote:
> > >
> > > Xmas eve pull request present. Just some fixes that trickled in this
> > > past week. Mostly amdgpu fixes, with a dma-buf/mips build fix and some
> > > misc komeda fixes.
> >
> > Well, I already pulled and pushed out my merge, but only noticed
> > afterwards that clang complains about this, and I think it's a real
> > bug:
> >
> >   drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_mpc.c:475:6:
> warning:
> >      variable 'val' is used uninitialized whenever 'if' condition is
> > false [-Wsometimes-uninitialized]
> >
> > and it sure is true: the code literally does
> >
> >         uint32_t val;
> >
> >         if (opp_id < MAX_OPP && REG(MUX[opp_id]))
> >                 REG_GET(MUX[opp_id], MPC_OUT_MUX, &val);
> >
> >         return val;
> >
> > so clearly 'val' isn't initialized if that if-statement isn't true.
> >
> > I assume 'opp_id' is always presumed to be valid, but that code really
> > is disgusting.
> >
> > Just make it return 0 (or whatever) for invalid, possibly together
> > with a WARN_ON_ONCE(). Ok?
>
> Harry, Nick, Hersen,
>
> Can you take a look?
>
> Thanks,
>
> Alex
>
> >
> >              Linus
> > _______________________________________________
> > dri-devel mailing list
> > dri-devel@xxxxxxxxxxxxxxxxxxxxx
> >
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--
Rodrigo Siqueira
https://siqueira.tech

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