Re: linux-next: build failure after merge of the drm tree

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Hi broonie@xxxxxxxxxx,

On Fri, 30 Sep 2022 11:54:34 +0100 broonie@xxxxxxxxxx wrote:
>
> After merging the drm tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
> 
> /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 dc_writeback_info[1]' [-Werror=array-bounds]
>   527 |     stream->writeback_info[j] = stream->writeback_info[i];
>       |                                 ~~~~~~~~~~~~~~~~~~~~~~^~~
> cc1: all warnings being treated as errors
> 
> Caused by
> 
>     5d8c3e836fc224 ("drm/amd/display: fix array-bounds error in dc_stream_remove_writeback()")
> 
> 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: array subscript [0, 0] is outside array bounds of 'struct dc_writeback_info[1]' [-Werror=array-bounds]
  527 |                                 stream->writeback_info[j] = stream->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_types.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/basics/dc_common.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:27:
drivers/gpu/drm/amd/amdgpu/../display/dc/dc_stream.h:241:34: note: while referencing 'writeback_info'
  241 |         struct dc_writeback_info writeback_info[MAX_DWB_PIPES];
      |                                  ^~~~~~~~~~~~~~

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

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