28 	struct ec_host_request *request;  in prepare_packet()  local
34 	BUG_ON(msg->outsize + sizeof(*request) > ec_dev->dout_size);  in prepare_packet()
37 	request = (struct ec_host_request *)out;  in prepare_packet()
38 	request->struct_version = EC_HOST_REQUEST_VERSION;  in prepare_packet()
39 	request->checksum = 0;  in prepare_packet()
40 	request->command = msg->command;  in prepare_packet()
41 	request->command_version = msg->version;  in prepare_packet()
42 	request->reserved = 0;  in prepare_packet()
43 	request->data_len = msg->outsize;  in prepare_packet()
45 	for (i = 0; i < sizeof(*request); i++)  in prepare_packet()
49 	memcpy(out + sizeof(*request), msg->data, msg->outsize);  in prepare_packet()
53 	request->checksum = -csum;  in prepare_packet()
55 	return sizeof(*request) + msg->outsize;  in prepare_packet()