struct usb_mixer_interface {
struct snd_usb_audio *chip;
- unsigned int ctrlif;
struct list_head list;
unsigned int ignore_ctl_error;
struct urb *urb;
unsigned int id;
unsigned int control; /* CS or ICN (high byte) */
unsigned int cmask; /* channel mask bitmap: 0 = master */
+ unsigned int ch_readonly;
+ unsigned int master_readonly;
int channels;
int val_type;
int min, max, res;