error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
if (error && error != EOPNOTSUPP) {
VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",
error = class->set_mtu ? class->set_mtu(netdev, mtu) : EOPNOTSUPP;
if (error && error != EOPNOTSUPP) {
VLOG_DBG_RL(&rl, "failed to set MTU for network device %s: %s",