This series of patches prevents possible division by zero. The user can set any speed value. If speed is greater than UINT_MAX/8, division by zero is possible.
Found by Linux Verification Center (linuxtesting.org) with SVACE. Denis Arefev (5): drm/amd/pm: Prevent division by zero drm/amd/pm: Prevent division by zero drm/amd/pm: Prevent division by zero drm/amd/pm: Prevent division by zero drm/amd/pm: Prevent division by zero drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_thermal.c | 6 +++--- drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_thermal.c | 4 ++-- drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_thermal.c | 2 +- drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c | 3 +++ drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c | 2 +- 5 files changed, 10 insertions(+), 7 deletions(-) I did not change these files, because the functions you are interested in are not used there for a long time. drivers/gpu/drm/radeon/si_dpm.c drivers/gpu/drm/radeon/ci_dpm.c -- 2.43.0
