Commit c52dcf49 authored by Rex Zhu's avatar Rex Zhu Committed by Alex Deucher

drm/amd/pp: Avoid divide-by-zero in fan_ctrl_set_fan_speed_rpm

The minRPM speed maybe equal to zero. so need to check
input RPM not equal to 0, otherwise cause divide-by-zero driver crash.
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarRex Zhu <Rex.Zhu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b3ca0f39
......@@ -260,6 +260,7 @@ int smu7_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
if (hwmgr->thermal_controller.fanInfo.bNoFan ||
(hwmgr->thermal_controller.fanInfo.
ucTachometerPulsesPerRevolution == 0) ||
speed == 0 ||
(speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
(speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
return 0;
......
......@@ -312,6 +312,7 @@ int vega10_fan_ctrl_set_fan_speed_rpm(struct pp_hwmgr *hwmgr, uint32_t speed)
int result = 0;
if (hwmgr->thermal_controller.fanInfo.bNoFan ||
speed == 0 ||
(speed < hwmgr->thermal_controller.fanInfo.ulMinRPM) ||
(speed > hwmgr->thermal_controller.fanInfo.ulMaxRPM))
return -1;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment