drm/amdgpu: cleanup kptr handling

Don't keep around the same pointer twice.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 250c8e8..9255c3e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -1060,7 +1060,7 @@
 	shadow = parent->bo->shadow;
 
 	if (vm->use_cpu_for_update) {
-		pd_addr = (unsigned long)parent->bo->kptr;
+		pd_addr = (unsigned long)amdgpu_bo_kptr(parent->bo);
 		r = amdgpu_vm_wait_pd(adev, vm, AMDGPU_FENCE_OWNER_VM);
 		if (unlikely(r))
 			return r;
@@ -1401,7 +1401,7 @@
 
 		pt = entry->bo;
 		if (use_cpu_update) {
-			pe_start = (unsigned long)pt->kptr;
+			pe_start = (unsigned long)amdgpu_bo_kptr(pt);
 		} else {
 			if (pt->shadow) {
 				pe_start = amdgpu_bo_gpu_offset(pt->shadow);