ppbus_write_ivar
error = ppbus_write_ivar(device_parent(dev), PPBUS_IVAR_DMA, &val);
error = ppbus_write_ivar(device_parent(dev), PPBUS_IVAR_IEEE, &val);
error = ppbus_write_ivar(device_parent(dev), PPBUS_IVAR_INTR, &val);
error = ppbus_write_ivar(dev, PPBUS_IVAR_IEEE, &new_ivar);
if(ppbus_write_ivar(dev, PPBUS_IVAR_IEEE, &old_ivar)) {
return (bus->ppbus_write_ivar(device_parent(dev), index, val));
int ppbus_write_ivar(device_t, int, unsigned int *);
ppbus->ppbus_write_ivar = sc_link->parport_write_ivar;
if(ppbus_write_ivar(self, PPBUS_IVAR_INTR, &val) != 0) {
PARPORT_WRITE_IVAR_T ppbus_write_ivar;
ppbus_write_ivar(sc->ppbus, PPBUS_IVAR_IEEE, &weg);