pdc_findev
if (!(dp->pz_dev = pdc_findev(-1, PCL_SEQU)))
if (!(dp->pz_dev = pdc_findev(-1, PCL_RANDOM)))
if (!(dp->pz_dev = pdc_findev(-1, PCL_NET_MASK|PCL_SEQU)))
struct pz_device *pdc_findev(int, int);