--- drivers/gpu/drm/ttm/ttm_bo_util.c

+++ drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -330,6 +330,7 @@ static int ttm_buffer_object_transfer(st

INIT_LIST_HEAD(&fbo->lru);

INIT_LIST_HEAD(&fbo->swap);

fbo->vm_node = NULL;

+ atomic_set(&fbo->cpu_writers, 0);

fbo->sync_obj = driver->sync_obj_ref(bo->sync_obj);

if (fbo->mem.mm_node)