ibta_mtu
static inline int ibta_mtu_to_int(enum ibta_mtu mtu)
int err, port, mtu, ibta_mtu = -1;
ibta_mtu = int_to_ibta_mtu(mtu);
if (err || ibta_mtu < 0) {
mdev->caps.port_ib_mtu[info->port] = ibta_mtu;