Re: [PATCH] drm/amdgpu: Fix oops when pp_funcs->switch_power_profile is unset

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Am 15.11.18 um 22:56 schrieb Kuehling, Felix:
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@xxxxxxx>
Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>

Acked-by: Christian König <christian.koenig@xxxxxxx>

---
  drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 7 +++++--
  1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
index a9c7597..1c1fed6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
@@ -503,8 +503,11 @@ 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)

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