PCI230_ADC_FIFOLEVEL_HALFFULL
wake = comedi_nsamples_left(s, PCI230_ADC_FIFOLEVEL_HALFFULL);
if (wake >= PCI230_ADC_FIFOLEVEL_HALFFULL) {
nsamples = comedi_nsamples_left(s, PCI230_ADC_FIFOLEVEL_HALFFULL);
fifoamount = PCI230_ADC_FIFOLEVEL_HALFFULL;