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

[Connor Abbott]

On Tue, Mar 26, 2024 at 7:47 PM Dmitry Baryshkov
<dmitry.baryshkov@xxxxxxxxxx> wrote:
>
> On Tue, 26 Mar 2024 at 21:32, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
> >
> >
> >
> > On 3/26/2024 12:10 PM, Dmitry Baryshkov wrote:
> > > On Tue, 26 Mar 2024 at 20:31, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
> > >>
> > >>
> > >>
> > >> On 3/26/2024 11:19 AM, Dmitry Baryshkov wrote:
> > >>> On Tue, 26 Mar 2024 at 20:05, Miguel Ojeda
> > >>> <miguel.ojeda.sandonis@xxxxxxxxx> 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