linux-kernel - Re: drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error: variable 'out' set but not used

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue, 26 Mar 2024 19:51:53 +0000
From: Connor Abbott <cwabbott0@...il.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc: Abhinav Kumar <quic_abhinavk@...cinc.com>, 
	Miguel Ojeda <miguel.ojeda.sandonis@...il.com>, Rob Clark <robdclark@...il.com>, 
	Sean Paul <sean@...rly.run>, Marijn Suijten <marijn.suijten@...ainline.org>, 
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, 
	linux-arm-msm <linux-arm-msm@...r.kernel.org>, dri-devel <dri-devel@...ts.freedesktop.org>, 
	freedreno@...ts.freedesktop.org, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error:
 variable 'out' set but not used

On Tue, Mar 26, 2024 at 7:47 PM Dmitry Baryshkov
<dmitry.baryshkov@...aro.org> wrote:
>
> On Tue, 26 Mar 2024 at 21:32, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
> >
> >
> >
> > On 3/26/2024 12:10 PM, Dmitry Baryshkov wrote:
> > > On Tue, 26 Mar 2024 at 20:31, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
> > >>
> > >>
> > >>
> > >> On 3/26/2024 11:19 AM, Dmitry Baryshkov wrote:
> > >>> On Tue, 26 Mar 2024 at 20:05, Miguel Ojeda
> > >>> <miguel.ojeda.sandonis@...il.com> wrote:
> > >>>>
> > >>>> Hi,
> > >>>>
> > >>>> In today's next, I got:
> > >>>>
> > >>>>       drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c:843:6: error: variable
> > >>>> 'out' set but not used [-Werror,-Wunused-but-set-variable]
> > >>>>
> > >>>> `out` seems to be there since commit 64d6255650d4 ("drm/msm: More
> > >>>> fully implement devcoredump for a7xx").
> > >>>>
> > >>>> Untested diff below assuming `dumper->iova` is constant -- if you want
> > >>>> a formal patch, please let me know.
> > >>>
> > >>> Please send a proper patch that we can pick up.
> > >>>
> > >>
> > >> This should be fixed with https://patchwork.freedesktop.org/patch/581853/.
> > >
> > > Is that a correct fix? If you check other usage locations for
> > > CRASHDUMP_READ, you'll see that `out` is the last parameter and it is
> > > being incremented.
> > >
> >
> > Right but in this function out is not the last parameter of CRASHDUMP_READ.
>
> Yes. I think in this case the patch from this email is more correct.

Yes, this patch is more correct than the other one. I tried to fix a
bug with a6xx that I noticed while adding support for a7xx, which I
forgot to split out from "drm/msm: More fully implement devcoredump
for a7xx" into a separate commit, and this hunk was missing. Sorry
about that.

Connor