snd_ctl_activate_id — activate/inactivate the control of the given id
|struct snd_card * card,|
|struct snd_ctl_elem_id * id,|
the card instance
the control id to activate/inactivate
non-zero to activate
Finds the control instance with the given id, and activate or inactivate the control together with notification, if changed. The given ID data is filled with full information.