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Date:   Tue, 4 Oct 2022 13:20:47 +1100
From:   Stephen Rothwell <sfr@canb.auug.org.au>
To:     Dave Airlie <airlied@redhat.com>
Cc:     broonie@kernel.org, Lucas Stach <l.stach@pengutronix.de>,
        Aurabindo Pillai <aurabindo.pillai@amd.com>,
        Hamza Mahfooz <hamza.mahfooz@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        DRI <dri-devel@lists.freedesktop.org>
Subject: Re: linux-next: build failure after merge of the drm tree
Message-ID: <20221004132047.435d42db@canb.auug.org.au>
In-Reply-To: <20220930105434.111407-1-broonie@kernel.org>
References: <20220930105434.111407-1-broonie@kernel.org>
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Hi broonie@kernel.org,

On Fri, 30 Sep 2022 11:54:34 +0100 broonie@kernel.org wrote:
>
> After merging the drm tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>=20
> /tmp/next/build/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c=
: In function 'dc_stream_remove_writeback':
> /tmp/next/build/drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c=
:527:55: error: array subscript [0, 0] is outside array bounds of 'struct d=
c_writeback_info[1]' [-Werror=3Darray-bounds]
>   527 |     stream->writeback_info[j] =3D stream->writeback_info[i];
>       |                                 ~~~~~~~~~~~~~~~~~~~~~~^~~
> cc1: all warnings being treated as errors
>=20
> Caused by
>=20
>     5d8c3e836fc224 ("drm/amd/display: fix array-bounds error in dc_stream=
_remove_writeback()")
>=20
> I have reverted that commit for today.

I am still getting this failure.  The full error is:

drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c: In function 'dc_=
stream_remove_writeback':
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:527:83: error: ar=
ray subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1=
]' [-Werror=3Darray-bounds]
  527 |                                 stream->writeback_info[j] =3D strea=
m->writeback_info[i];
      |                                                             ~~~~~~~=
~~~~~~~~~~~~~~~^~~
In file included from drivers/gpu/drm/amd/amdgpu/../display/dc/dc.h:1269,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/inc/core_typ=
es.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/basics/dc_co=
mmon.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stre=
am.c:27:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_stream.h:241:34: note: while re=
ferencing 'writeback_info'
  241 |         struct dc_writeback_info writeback_info[MAX_DWB_PIPES];
      |                                  ^~~~~~~~~~~~~~

I have reverted that commit again today.
--=20
Cheers,
Stephen Rothwell

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