drm/amdkfd: Don't clear PT after process killed

commit 597eb70f7ff7551ff795cd51754b81aabedab67b upstream.

If process is killed. the vm entity is stopped, submit pt update job
will trigger the error message "*ERROR* Trying to push to a killed
entity", job will not execute.

Suggested-by: Christian König <[email protected]>
Signed-off-by: Philip Yang <[email protected]>
Reviewed-by: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 10c382ec6c6d1e11975a11962bec21cba6360391)
Cc: [email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: amd-yangp

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

@@ -1263,6 +1263,10 @@ static int unmap_bo_from_gpuvm(struct kgd_mem *mem,
 
 	(void)amdgpu_vm_bo_unmap(adev, bo_va, entry->va);
 
+	/* VM entity stopped if process killed, don't clear freed pt bo */
+	if (!amdgpu_vm_ready(vm))
+		return 0;
+
 	(void)amdgpu_vm_clear_freed(adev, vm, &bo_va->last_pt_update);
 
 	(void)amdgpu_sync_fence(sync, bo_va->last_pt_update, GFP_KERNEL);