TX_OFF
case TX_OFF:
(zss->sl_txstate != TX_OFF) &&
if (zss->sl_txstate != TX_OFF) {
if (zss->sl_txstate != TX_OFF) { \
zss->sl_txstate = TX_OFF;
zss->sl_txstate = TX_OFF; /* so it can't rearm in close */
zss->sl_txstate = TX_OFF; /* so it can't rearm in close */