dev/en/midway.c

1456 	 * (drq_chip == drq_us) to mean "list is empty"... but if you allow the
1457 	 * circular list to be completely full then (drq_chip == drq_us) [i.e.
1458 	 * the drq_us pointer will wrap all the way around].   by restricting
1468 	sc->drq_us = sc->drq_chip;
2005 	drq = sc->drq_us;
2138 	sc->drq_us = drq;
2141 	en_write(sc, MID_DMA_WRRX, MID_DRQ_A2REG(sc->drq_us));
2382 		en_write(sc, sc->drq_us,
2386 	  	en_write(sc, sc->drq_us,
2389 	en_write(sc, sc->drq_us + 4, 0);
2390 	EN_WRAPADD(MID_DRQOFF, MID_DRQEND, sc->drq_us, 8);
2394 	sc->drq[MID_DRQ_A2REG(sc->drq_us)] = EN_DQ_MK(slot - sc->rxslot, 0);
2398 	en_write(sc, MID_DMA_WRRX, MID_DRQ_A2REG(sc->drq_us));
3177 	    MID_DRQ_REG2A(en_read(sc, MID_DMA_WRRX)), sc->drq_chip, sc->drq_us);
3267 	while (ptr != sc->drq_us) {