PLS_OFFLINE
ret = set_physical_link_state(dd, (rem_reason << 8) | PLS_OFFLINE);
ret = wait_physical_linkstate(ppd, PLS_OFFLINE, 30000);
case PLS_OFFLINE:
if ((read_state & 0xF0) == PLS_OFFLINE)
if ((read_state & 0xF0) != PLS_OFFLINE)
PLS_OFFLINE);