linux-kernel - Re: [PATCH] drm/msm: fix the `CRASHDUMP_READ` target of `a6xx_get_shader

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Date: Fri, 5 Apr 2024 15:48:56 +1000
From: Dave Airlie <airlied@...il.com>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: Miguel Ojeda <ojeda@...nel.org>, Rob Clark <robdclark@...il.com>, 
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, Daniel Vetter <daniel@...ll.ch>, 
	Connor Abbott <cwabbott0@...il.com>, linux-arm-msm@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm: fix the `CRASHDUMP_READ` target of `a6xx_get_shader_block()`

On Sat, 30 Mar 2024 at 04:39, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
>
>
> On 3/26/2024 2:23 PM, Miguel Ojeda wrote:
> > Clang 14 in an (essentially) defconfig arm64 build for next-20240326
> > reports [1]:
> >
> >      drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error:
> >      variable 'out' set but not used [-Werror,-Wunused-but-set-variable]
> >
> > The variable `out` in these functions is meant to compute the `target` of
> > `CRASHDUMP_READ()`, but in this case only the initial value (`dumper->iova
> > + A6XX_CD_DATA_OFFSET`) was being passed.
> >
> > Thus use `out` as it was intended by Connor [2].
> >
> > There was an alternative patch at [3] that removed the variable
> > altogether, but that would only use the initial value.
> >
> > Fixes: 64d6255650d4 ("drm/msm: More fully implement devcoredump for a7xx")
> > Closes: https://lore.kernel.org/lkml/CANiq72mjc5t4n25SQvYSrOEhxxpXYPZ4pPzneSJHEnc3qApu2Q@mail.gmail.com/ [1]
> > Link: https://lore.kernel.org/lkml/CACu1E7HhCKMJd6fixZSPiNAz6ekoZnkMTHTcLFVmbZ-9VoLxKg@mail.gmail.com/ [2]
> > Link: https://lore.kernel.org/lkml/20240307093727.1978126-1-colin.i.king@gmail.com/ [3]
> > Signed-off-by: Miguel Ojeda <ojeda@...nel.org>
> > ---
>
>
> LGTM,
>
> Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>

I'm seeing this on my drm-next tree, where is this fix landing?

Dave.