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[ALSA] fix selector unit bug affecting some USB speakerphones

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Following the suggestion in this thread:
https://bugs.launchpad.net/ubuntu/+source/alsa-lib/+bug/26683
the correct upper bound on desc[0] is 5 + num_ins not 6 + num_ins,
because the index used later is 5+i, not 6+i.
This change makes my Vosky Chatterbox speakerphone work.
Apparently it also helps with the Minivox MV100.

Signed-off-by: Russ Cox <rsc@swtch.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
This commit is contained in:
Russ Cox 2007-08-06 15:37:58 +02:00 committed by Jaroslav Kysela
parent 6ed44ad3eb
commit 38977e96cb
1 changed files with 1 additions and 1 deletions
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2
sound/usb/usbmixer.c
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@ -1483,7 +1483,7 @@ static int parse_audio_selector_unit(struct mixer_build *state, int unitid, unsi
struct snd_kcontrol *kctl;
char **namelist;
if (! num_ins || desc[0] < 6 + num_ins) {
if (! num_ins || desc[0] < 5 + num_ins) {
snd_printk(KERN_ERR "invalid SELECTOR UNIT descriptor %d\n", unitid);
return -EINVAL;
}