wdc_atapi_intr_complete
void wdc_atapi_intr_complete(struct channel_softc *, struct wdc_xfer *,
wdc_atapi_intr_complete(chp, xfer, timeout, ret);
wdc_atapi_intr_complete(chp, xfer, timeout, ret);
xfer->next = wdc_atapi_intr_complete;