master_vol_ctl 238 sound/usb/mixer_scarlett_gen2.c struct snd_kcontrol *master_vol_ctl; master_vol_ctl 1381 sound/usb/mixer_scarlett_gen2.c 0, 1, s, &private->master_vol_ctl); master_vol_ctl 1913 sound/usb/mixer_scarlett_gen2.c &private->master_vol_ctl->id);