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17 May 2024, 09:02:56 UTC
Revision 44035ec2fde1114254ee465f9ba3bb246b0b6283 authored by Lyude Paul on 14 November 2022, 22:20:45 UTC, committed by Alex Deucher on 23 November 2022, 14:01:53 UTC 
drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN
 
There's been a very long running bug that seems to have been neglected for
a while, where amdgpu consistently triggers a KASAN error at start:

  BUG: KASAN: global-out-of-bounds in read_indirect_azalia_reg+0x1d4/0x2a0 [amdgpu]
  Read of size 4 at addr ffffffffc2274b28 by task modprobe/1889

After digging through amd's rather creative method for accessing registers,
I eventually discovered the problem likely has to do with the fact that on
my dce120 GPU there are supposedly 7 sets of audio registers. But we only
define a register mapping for 6 sets.

So, fix this and fix the KASAN warning finally.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1 parent 4f2bea6
History
Tip revision: 44035ec2fde1114254ee465f9ba3bb246b0b6283 authored by Lyude Paul on 14 November 2022, 22:20:45 UTC
drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN
Tip revision: 44035ec
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