dmabuf = dma_buf_get(dmabuf_fd); if (IS_ERR(dmabuf)) { err = PTR_ERR(dmabuf); mca_info_fl("got dmabuf fail %d\n", err); goto err_buf_get; } mca_info_fl("got dmabuf %p %s\n", dmabuf, dmabuf->exp_name); dev = kzalloc(sizeof(*dev), GFP_KERNEL); dev_set_name(...