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Diffstat (limited to 'drivers/media/dvb-core/dvbdev.h')
| -rw-r--r-- | drivers/media/dvb-core/dvbdev.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/media/dvb-core/dvbdev.h b/drivers/media/dvb-core/dvbdev.h index 4aff7bd3dea8..576bbd4445b5 100644 --- a/drivers/media/dvb-core/dvbdev.h +++ b/drivers/media/dvb-core/dvbdev.h @@ -212,8 +212,31 @@ int dvb_register_device(struct dvb_adapter *adap, int demux_sink_pads); /** + * dvb_remove_device - Remove a registered DVB device + * + * This does not free memory. To do that, call dvb_free_device(). + * + * @dvbdev: pointer to struct dvb_device + */ +void dvb_remove_device(struct dvb_device *dvbdev); + +/** + * dvb_free_device - Free memory occupied by a DVB device. + * + * Call dvb_unregister_device() before calling this function. + * + * @dvbdev: pointer to struct dvb_device + */ +void dvb_free_device(struct dvb_device *dvbdev); + +/** * dvb_unregister_device - Unregisters a DVB device * + * This is a combination of dvb_remove_device() and dvb_free_device(). + * Using this function is usually a mistake, and is often an indicator + * for a use-after-free bug (when a userspace process keeps a file + * handle to a detached device). + * * @dvbdev: pointer to struct dvb_device */ void dvb_unregister_device(struct dvb_device *dvbdev); |