diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dvbdev.h')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dvbdev.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dvbdev.h b/drivers/media/dvb/dvb-core/dvbdev.h index 01fc704..f7b499d 100644 --- a/drivers/media/dvb/dvb-core/dvbdev.h +++ b/drivers/media/dvb/dvb-core/dvbdev.h @@ -54,6 +54,8 @@ module_param_array(adapter_nr, short, NULL, 0444); \ MODULE_PARM_DESC(adapter_nr, "DVB adapter numbers") +struct dvb_frontend; + struct dvb_adapter { int num; struct list_head list_head; @@ -69,6 +71,32 @@ struct dvb_adapter { int mfe_shared; /* indicates mutually exclusive frontends */ struct dvb_device *mfe_dvbdev; /* frontend device in use */ struct mutex mfe_lock; /* access lock for thread creation */ + + /* Allow the adapter/bridge driver to perform an action before and/or + * after the core handles an ioctl: + * + * DVB_FE_IOCTL_PRE indicates that the ioctl has not yet been handled. + * DVB_FE_IOCTL_POST indicates that the ioctl has been handled. + * + * When DVB_FE_IOCTL_PRE is passed to the callback as the stage arg: + * + * return 0 to allow dvb-core to handle the ioctl. + * return a positive int to prevent dvb-core from handling the ioctl, + * and exit without error. + * return a negative int to prevent dvb-core from handling the ioctl, + * and return that value as an error. + * + * When DVB_FE_IOCTL_POST is passed to the callback as the stage arg: + * + * return 0 to allow the dvb_frontend ioctl handler to exit normally. + * return a negative int to cause the dvb_frontend ioctl handler to + * return that value as an error. + */ +#define DVB_FE_IOCTL_PRE 0 +#define DVB_FE_IOCTL_POST 1 + int (*fe_ioctl_override)(struct dvb_frontend *fe, + unsigned int cmd, void *parg, + unsigned int stage); }; |
