ALSA: usx2y: Fix invalid stream URBs

[platform/kernel/linux-rpi.git] / sound / usb / mixer_maps.c

diff --git a/sound/usb/mixer_maps.c b/sound/usb/mixer_maps.c
index 9038b2e..eaa03ac 100644 (file)
--- a/sound/usb/mixer_maps.c
+++ b/sound/usb/mixer_maps.c
@@ -353,8 +353,11 @@ static struct usbmix_name_map bose_companion5_map[] = {
 /*
  * Dell usb dock with ALC4020 codec had a firmware problem where it got
  * screwed up when zero volume is passed; just skip it as a workaround
+ *
+ * Also the extension unit gives an access error, so skip it as well.
  */
 static const struct usbmix_name_map dell_alc4020_map[] = {
+       { 4, NULL },    /* extension unit */
        { 16, NULL },
        { 19, NULL },
        { 0 }