PAUSE_TX
pause |= PAUSE_TX;
fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
unsigned int fc = lc->requested_fc & (PAUSE_RX | PAUSE_TX);
lc->requested_fc = lc->fc = PAUSE_RX | PAUSE_TX;
if (fc & PAUSE_TX)
pause = PAUSE_RX | PAUSE_TX;
pause = PAUSE_TX;
if (fc & PAUSE_TX)