KEYSPAN_PORT_TX_STOPPED
kp->kp_flags |= KEYSPAN_PORT_TX_STOPPED;
if (kp->kp_flags & KEYSPAN_PORT_TX_STOPPED) {
kp->kp_flags &= ~KEYSPAN_PORT_TX_STOPPED;
if ((kp->kp_flags & KEYSPAN_PORT_TX_STOPPED) ||