ALSA: snd-usb-audio: Skip un-parseable mixer units instead of erroring

Some interfaces reference endpoints which do not exists. To
accomodate these, do not fail completely, but skip over them.

This allows the Electrix Ebox-44 with earlier firmware to be
detected and used for audio.

Signed-off-by: Mark Hills <mark@pogo.org.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index ab23869c01bb..c374c7242ab2 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1388,7 +1388,7 @@ static int parse_audio_mixer_unit(struct mixer_build *state, int unitid, void *r
         for (pin = 0; pin < input_pins; pin++) {
                 err = parse_audio_unit(state, desc->baSourceID[pin]);
                 if (err < 0)
-                        return err;
+                        continue;
                 err = check_input_term(state, desc->baSourceID[pin], &iterm);
                 if (err < 0)
                         return err;