ec_request
struct ec_host_request ec_request;
out_msg->ec_request.struct_version,
out_msg->ec_request.checksum,
out_msg->ec_request.command,
out_msg->ec_request.command_version,
out_msg->ec_request.data_len);
struct ec_host_request ec_request;
offsetof(struct cros_ish_out_msg, ec_request)
struct ec_request rq;