if (r < 0)
return -errno;
- setsockopt(m->server_socket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+ r = setsockopt(m->server_socket, IPPROTO_IP, IP_TOS, &tos, sizeof(tos));
+ if (r < 0)
+ return -errno;
return sd_event_add_io(m->event, &m->event_receive, m->server_socket, EPOLLIN, manager_receive_response, m);
}