[ 22/49] ALSA: snd-usb: mixer: propagate errors up the call chain

Greg Kroah-Hartman
2013-03-26T23:08:46Z

From: Daniel Mack <zonque@gmail.com>

commit 4d7b86c98e445b075c2c4c3757eb6d3d6efbe72e upstream.

In check_input_term() and parse_audio_feature_unit(), propagate the
error value that has been returned by a failing function instead of
-EINVAL. That helps cleaning up the error pathes in the mixer.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
sound/usb/mixer.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -711,8 +711,9 @@ static int check_input_term(struct mixer
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);
@@ -1262,8 +1263,9 @@ static int parse_audio_feature_unit(stru
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 */