drm/amdgpu: Fix oops when pp_funcs->switch_power_profile is unset

On Vega20 and other pre-production GPUs, powerplay is not enabled yet.
Check for NULL pointers before calling pp_funcs function pointers.

Also affects Kaveri.

CC: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
index c31a884..1580ec6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
@@ -501,8 +501,11 @@ void amdgpu_amdkfd_set_compute_idle(struct kgd_dev *kgd, bool idle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)kgd;
 
-       amdgpu_dpm_switch_power_profile(adev,
-                                       PP_SMC_POWER_PROFILE_COMPUTE, !idle);
+       if (adev->powerplay.pp_funcs &&
+           adev->powerplay.pp_funcs->switch_power_profile)
+               amdgpu_dpm_switch_power_profile(adev,
+                                               PP_SMC_POWER_PROFILE_COMPUTE,
+                                               !idle);
 }
 
 bool amdgpu_amdkfd_is_kfd_vmid(struct amdgpu_device *adev, u32 vmid)