1 files changed, 13 insertions, 8 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 638e7f738018..ca4739c3f650 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -715,8 +715,9 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_
                 case UAC2_CLOCK_SELECTOR: {
                         struct uac_selector_unit_descriptor *d = p1;
                         /* call recursively to retrieve the channel info */
-                        if (check_input_term(state, d->baSourceID[0], term) < 0)
-                                return -ENODEV;
+                        err = check_input_term(state, d->baSourceID[0], term);
+                        if (err < 0)
+                                return err;
                         term->type = d->bDescriptorSubtype << 16; /* virtual type */
                         term->id = id;
                         term->name = uac_selector_unit_iSelector(d);
@@ -725,7 +726,8 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_
                 case UAC1_PROCESSING_UNIT:
                 case UAC1_EXTENSION_UNIT:
                 /* UAC2_PROCESSING_UNIT_V2 */
-                /* UAC2_EFFECT_UNIT */ {
+                /* UAC2_EFFECT_UNIT */
+                case UAC2_EXTENSION_UNIT_V2: {
                         struct uac_processing_unit_descriptor *d = p1;
 
                         if (state->mixer->protocol == UAC_VERSION_2 &&
@@ -1356,8 +1358,9 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
                 return err;
 
         /* determine the input source type and name */
-        if (check_input_term(state, hdr->bSourceID, &iterm) < 0)
-                return -EINVAL;
+        err = check_input_term(state, hdr->bSourceID, &iterm);
+        if (err < 0)
+                return err;
 
         master_bits = snd_usb_combine_bytes(bmaControls, csize);
         /* master configuration quirks */
@@ -2052,6 +2055,8 @@ static int parse_audio_unit(struct mixer_build *state, int unitid)
                         return parse_audio_extension_unit(state, unitid, p1);
                 else /* UAC_VERSION_2 */
                         return parse_audio_processing_unit(state, unitid, p1);
+        case UAC2_EXTENSION_UNIT_V2:
+                return parse_audio_extension_unit(state, unitid, p1);
         default:
                 snd_printk(KERN_ERR "usbaudio: unit %u: unexpected type 0x%02x\n", unitid, p1[2]);
                 return -EINVAL;
@@ -2118,7 +2123,7 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
                         state.oterm.type = le16_to_cpu(desc->wTerminalType);
                         state.oterm.name = desc->iTerminal;
                         err = parse_audio_unit(&state, desc->bSourceID);
-                        if (err < 0)
+                        if (err < 0 && err != -EINVAL)
                                 return err;
                 } else { /* UAC_VERSION_2 */
                         struct uac2_output_terminal_descriptor *desc = p;
@@ -2130,12 +2135,12 @@ static int snd_usb_mixer_controls(struct usb_mixer_interface *mixer)
                         state.oterm.type = le16_to_cpu(desc->wTerminalType);
                         state.oterm.name = desc->iTerminal;
                         err = parse_audio_unit(&state, desc->bSourceID);
-                        if (err < 0)
+                        if (err < 0 && err != -EINVAL)
                                 return err;
 
                         /* for UAC2, use the same approach to also add the clock selectors */
                         err = parse_audio_unit(&state, desc->bCSourceID);
-                        if (err < 0)
+                        if (err < 0 && err != -EINVAL)
                                 return err;
                 }
         }