wdcdetach
if ((error = wdcdetach(self, flags)) != 0)
if ((rv = wdcdetach(sc->sc_wdcdev.sc_atac.atac_dev, flags)))
int wdcdetach(device_t, int);
if ((rc = wdcdetach(self, flags)) != 0)
rv = wdcdetach(sc->sc_wdcdev.sc_atac.atac_dev, flags);
if ((error = wdcdetach(self, flags)) != 0)