UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/amdgpu: Check if SW SMU is supported before accessing funcs 

smu.ppt_funcs is only initialized for ASICs supporting SW SMU.

On a Hawaii ASIC, attempting to access the udev attribute
ATTRS{power_dpm_state} will cause a null pointer deref in
amdgpu_get_dpm_state() because of this.

Fix by checking if SW SMU is supported first.

Signed-off-by: Leo Li <sunpeng.li@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo Li 2019-04-18 11:53:58 -04:00 committed by Alex Deucher
parent 3b8cea6f64
commit bb20be7510
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
View File

@ -144,7 +144,7 @@ static ssize_t amdgpu_get_dpm_state(struct device *dev,
struct amdgpu_device *adev = ddev->dev_private;
enum amd_pm_state_type pm;
if (adev->smu.ppt_funcs->get_current_power_state)
if (is_support_sw_smu(adev) && adev->smu.ppt_funcs->get_current_power_state)
pm = amdgpu_smu_get_current_power_state(adev);
else if (adev->powerplay.pp_funcs->get_current_power_state)
pm = amdgpu_dpm_get_current_power_state(adev);