diff options
| -rw-r--r-- | drivers/staging/comedi/comedidev.h | 2 | ||||
| -rw-r--r-- | drivers/staging/comedi/drivers.c | 19 |
2 files changed, 20 insertions, 1 deletions
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h index ce509d02c21..cdd472094ce 100644 --- a/drivers/staging/comedi/comedidev.h +++ b/drivers/staging/comedi/comedidev.h @@ -216,6 +216,7 @@ struct comedi_device { /* dumb */ unsigned long iobase; + unsigned long iolen; unsigned int irq; struct comedi_subdevice *read_subdev; @@ -354,6 +355,7 @@ int __comedi_request_region(struct comedi_device *, unsigned long start, unsigned long len); int comedi_request_region(struct comedi_device *, unsigned long start, unsigned long len); +void comedi_legacy_detach(struct comedi_device *); int comedi_auto_config(struct device *, struct comedi_driver *, unsigned long context); diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c index 2a28f64dc74..6fecefeb51f 100644 --- a/drivers/staging/comedi/drivers.c +++ b/drivers/staging/comedi/drivers.c @@ -122,6 +122,7 @@ static void cleanup_device(struct comedi_device *dev) dev->board_name = NULL; dev->board_ptr = NULL; dev->iobase = 0; + dev->iolen = 0; dev->ioenabled = false; dev->irq = 0; dev->read_subdev = NULL; @@ -387,13 +388,29 @@ int comedi_request_region(struct comedi_device *dev, int ret; ret = __comedi_request_region(dev, start, len); - if (ret == 0) + if (ret == 0) { dev->iobase = start; + dev->iolen = len; + } return ret; } EXPORT_SYMBOL_GPL(comedi_request_region); +/** + * comedi_legacy_detach() - A generic (*detach) function for legacy drivers. + * @dev: comedi_device struct + */ +void comedi_legacy_detach(struct comedi_device *dev) +{ + if (dev->iobase && dev->iolen) { + release_region(dev->iobase, dev->iolen); + dev->iobase = 0; + dev->iolen = 0; + } +} +EXPORT_SYMBOL_GPL(comedi_legacy_detach); + int comedi_device_attach(struct comedi_device *dev, struct comedi_devconfig *it) { struct comedi_driver *driv; |