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(parent: f7d5991) | patch
drm/amd/display: Fix potential integer wraparound resulting in a hang
authorAric Cyr <aric.cyr@amd.com>
Tue, 12 May 2020 15:48:48 +0000 (11:48 -0400)
committerAlex Deucher <alexander.deucher@amd.com>
Wed, 27 May 2020 22:13:14 +0000 (18:13 -0400)
commit4e5183200d9b66695c754ef214933402056e7b95
tree499c86fa12aa05bb51f93bca22f9a864a97990eetree | snapshot
parentf7d5991b92ff824798693ddf231cf814c9d5a88bcommit | diff
drm/amd/display: Fix potential integer wraparound resulting in a hang

[Why]
If VUPDATE_END is before VUPDATE_START the delay calculated can become
very large, causing a soft hang.

[How]
Take the absolute value of the difference between START and END.

Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git