drm/vmwgfx: move null mem checks outside move notifies

Both fns checked mem == NULL, just move the check outside.
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201006000644.1005758-3-airlied@gmail.com

drivers/gpu/drm/vmwgfx/vmwgfx_bo.c

@@ -1192,9 +1192,6 @@ void vmw_bo_move_notify(struct ttm_buffer_object *bo,
 {
 	struct vmw_buffer_object *vbo;
 
-	if (mem == NULL)
-		return;
-
 	/* Make sure @bo is embedded in a struct vmw_buffer_object? */
 	if (bo->destroy != vmw_bo_bo_free &&
 	    bo->destroy != vmw_user_bo_destroy)

drivers/gpu/drm/vmwgfx/vmwgfx_resource.c

@@ -867,7 +867,7 @@ void vmw_query_move_notify(struct ttm_buffer_object *bo,
 	mutex_lock(&dev_priv->binding_mutex);
 
 	dx_query_mob = container_of(bo, struct vmw_buffer_object, base);
-	if (mem == NULL || !dx_query_mob || !dx_query_mob->dx_query_ctx) {
+	if (!dx_query_mob || !dx_query_mob->dx_query_ctx) {
 		mutex_unlock(&dev_priv->binding_mutex);
 		return;
 	}

drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

@@ -707,6 +707,8 @@ static void vmw_move_notify(struct ttm_buffer_object *bo,
 			    bool evict,
 			    struct ttm_resource *mem)
 {
+	if (!mem)
+		return;
 	vmw_bo_move_notify(bo, mem);
 	vmw_query_move_notify(bo, mem);
 }