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(parent: 8d43e39) | 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 22:42:10 +0000 (18:42 -0400)
commit185082b679b4bd6dfb69764eaa89213b26f6f703
tree3d27954d6d7877c4d8eb79aabe481ecb49ef9e9dtree | snapshot
parent8d43e3966b31df1986342dc8b69072ee26f0589bcommit | 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>
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c diff | blob | history
Domain: System / Kernel;