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ALSA: usb: Parse UAC2 extension unit like for UAC1

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UAC2_EXTENSION_UNIT_V2 differs from UAC1_EXTENSION_UNIT, but can be handled in
the same way when parsing the unit. Otherwise parse_audio_unit() fails when it
sees an extension unit on a UAC2 device.

UAC2_EXTENSION_UNIT_V2 is outside the range allocated by UAC1.

Signed-off-by: Torstein Hegge <hegge@resisty.net>
Acked-by: Daniel Mack <zonque@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Torstein Hegge 2013-03-19 17:12:14 +01:00 committed by Takashi Iwai
parent 039eb75350
commit 61ac51301e
1 changed files with 4 additions and 1 deletions
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5
sound/usb/mixer.c
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@ -725,7 +725,8 @@ 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 &&
@ -2052,6 +2053,8 @@ 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;