ALSA: usb-audio: Add mute TLV for playback volumes on C-Media devices

[pandora-kernel.git] / sound / usb / mixer.c

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 9c36a1f..b6bef94 100644 (file)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -515,6 +515,8 @@ static int mixer_vol_tlv(struct snd_kcontrol *kcontrol, int op_flag,
 
        if (size < sizeof(scale))
                return -ENOMEM;
+       if (cval->min_mute)
+               scale[0] = SNDRV_CTL_TLVT_DB_MINMAX_MUTE;
        scale[2] = cval->dBmin;
        scale[3] = cval->dBmax;
        if (copy_to_user(_tlv, scale, sizeof(scale)))