1 files changed, 9 insertions, 0 deletions

diff --git a/sound/usb/usbmixer.c b/sound/usb/usbmixer.c
index 9efcfd08d747..c998220b99c6 100644
--- a/sound/usb/usbmixer.c
+++ b/sound/usb/usbmixer.c
@@ -1071,6 +1071,15 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, unsig
         channels = (ftr[0] - 7) / csize - 1;
 
         master_bits = snd_usb_combine_bytes(ftr + 6, csize);
+        /* master configuration quirks */
+        switch (state->chip->usb_id) {
+        case USB_ID(0x08bb, 0x2702):
+                snd_printk(KERN_INFO
+                           "usbmixer: master volume quirk for PCM2702 chip\n");
+                /* disable non-functional volume control */
+                master_bits &= ~(1 << (USB_FEATURE_VOLUME - 1));
+                break;
+        }
         if (channels > 0)
                 first_ch_bits = snd_usb_combine_bytes(ftr + 6 + csize, csize);
         else