static void virgl_resource_attach_backing(VirtIOGPU *g, struct virtio_gpu_ctrl_command *cmd) { struct virtio_gpu_resource_attach_backing att_rb; struct iovec *res_iovs; int ret; VIRTIO_GPU_FILL_CMD(att_rb); trace_virtio_gpu_cmd_res_back_attach(att_rb.resource_id); ret = virtio_gpu_create_mapping_iov(&att_rb, cmd, NULL, &res_iovs); if (ret != 0) { cmd->error = VIRTIO_GPU_RESP_ERR_UNSPEC; return; } virgl_renderer_resource_attach_iov(att_rb.resource_id, res_iovs, att_rb.nr_entries); }