drm/amdgpu: validate the flush_gpu_tlb_pasid()

Validate flush_gpu_tlb_pasid() availability before flushing tlb.

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
index 6d7b8bb..0e67fa4 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
@@ -780,6 +780,10 @@ int amdgpu_gmc_flush_gpu_tlb_pasid(struct amdgpu_device *adev, uint16_t pasid,
                return 0;
 
        if (!adev->gmc.flush_pasid_uses_kiq || !ring->sched.ready) {
+
+               if (!adev->gmc.gmc_funcs->flush_gpu_tlb_pasid)
+                       return 0;
+
                if (adev->gmc.flush_tlb_needs_extra_type_2)
                        adev->gmc.gmc_funcs->flush_gpu_tlb_pasid(adev, pasid,
                                                                 2, all_hub,