PPB_DONTWAIT
error = ppb_request_bus(ppbus, dev, PPB_DONTWAIT);
if (ppb_request_bus(ppbus, dev, PPB_DONTWAIT)) {
if (ppb_request_bus(ppbus, dev, PPB_DONTWAIT)) {
if ((error = lpt_request_ppbus(dev, PPB_DONTWAIT))) {
if ((error = lpt_request_ppbus(dev, PPB_DONTWAIT))) {
(flag & O_NONBLOCK) ? PPB_DONTWAIT : PPB_WAIT);
ppb_peripheral_terminate(ppbus, PPB_DONTWAIT);
(flags & O_NONBLOCK) ? PPB_DONTWAIT : PPB_WAIT | PPB_INTR);
if (ppb_request_bus(ppbus, dev, PPB_DONTWAIT)) {