Function at drivers/staging/comedi/drivers/ni_660x.c, line 452 References: drivers/staging/comedi/drivers/ni_660x.c, line 452 drivers/staging/comedi/drivers/ni_660x.c, line 503 drivers/staging/comedi/drivers/ni_660x.c, line 1007 drivers/staging/comedi/drivers/ni_660x.c, line 1024 drivers/staging/comedi/drivers/ni_660x.c, line 1048 drivers/staging/comedi/drivers/ni_660x.c, line 1121 drivers/staging/comedi/drivers/ni_660x.c, line 1137 drivers/staging/comedi/drivers/ni_660x.c, line 1148 drivers/staging/comedi/drivers/ni_660x.c, line 1274