diff options
Diffstat (limited to 'drivers/staging/comedi/comedi_fops.c')
| -rw-r--r-- | drivers/staging/comedi/comedi_fops.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_fops.c b/drivers/staging/comedi/comedi_fops.c index 91b9e93321e2..38de7f70f0b8 100644 --- a/drivers/staging/comedi/comedi_fops.c +++ b/drivers/staging/comedi/comedi_fops.c @@ -90,6 +90,26 @@ static DEFINE_SPINLOCK(comedi_file_info_table_lock); static struct comedi_device_file_info *comedi_file_info_table[COMEDI_NUM_MINORS]; +static struct comedi_subdevice * +comedi_get_read_subdevice(const struct comedi_device_file_info *info) +{ + if (info->read_subdevice) + return info->read_subdevice; + if (info->device == NULL) + return NULL; + return info->device->read_subdev; +} + +static struct comedi_subdevice * +comedi_get_write_subdevice(const struct comedi_device_file_info *info) +{ + if (info->write_subdevice) + return info->write_subdevice; + if (info->device == NULL) + return NULL; + return info->device->write_subdev; +} + static int resize_async_buffer(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_async *async, unsigned new_size) |