tree 46383ee0d7692f314978b453dca43966c3d2a038
parent 0f18563aaa22f7dd1712c20973482225aa13942a
author Rex Zhu <Rex.Zhu@amd.com> 1451368563 +0800
committer Alex Deucher <alexander.deucher@amd.com> 1455139272 -0500

drm/amd/powerplay: add powerplay valid check to avoid null point.

In case CONFIG_DRM_AMD_POWERPLAY is defined and amdgpu.powerplay=0.
some functions in powrplay can also be called by DAL. and the input parameter is *adev.
if just check point not NULL was not enough and will lead to NULL point error.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>