find_empty_mixer_ctl_idx 2467 sound/pci/hda/hda_codec.c idx = find_empty_mixer_ctl_idx(codec, "IEC958 Playback Switch", idx); find_empty_mixer_ctl_idx 2696 sound/pci/hda/hda_codec.c idx = find_empty_mixer_ctl_idx(codec, "IEC958 Capture Switch", 0); find_empty_mixer_ctl_idx 3360 sound/pci/hda/hda_codec.c idx = find_empty_mixer_ctl_idx(codec,