IB_MTU_512
case IB_MTU_512:
return IB_MTU_512;
case 512: return IB_MTU_512;
case IB_MTU_512: return 512;
ib_mtu_size = IB_MTU_512;
p_rec.mtu = IB_MTU_512;
else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
return IB_MTU_512;
case IB_MTU_512: return 512;
return IB_MTU_512;