LM_MEDIUM_TYPE_PHY_LOOPBACK
if(GET_MEDIUM_TYPE(req_medium) == LM_MEDIUM_TYPE_PHY_LOOPBACK)
SET_MEDIUM_TYPE(pdev->vars.medium, LM_MEDIUM_TYPE_PHY_LOOPBACK);
case LM_MEDIUM_TYPE_PHY_LOOPBACK:
case LM_MEDIUM_TYPE_PHY_LOOPBACK:
((GET_MEDIUM_TYPE(_medium)) == LM_MEDIUM_TYPE_PHY_LOOPBACK) || \
((GET_MEDIUM_TYPE(_medium)) == LM_MEDIUM_TYPE_PHY_LOOPBACK) || \