Symbol: CHAN_OP_DRAIN
sys/dev/sound/usb/uaudio.c
1265
sc->sc_play_chan[i].operation = CHAN_OP_DRAIN;
sys/dev/sound/usb/uaudio.c
1266
sc->sc_rec_chan[i].operation = CHAN_OP_DRAIN;
sys/dev/sound/usb/uaudio.c
2817
if (ch->operation == CHAN_OP_DRAIN)