This is a note to let you know that I've just added the patch titled
ALSA: usb: Parse UAC2 extension unit like for UAC1
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-usb-parse-uac2-extension-unit-like-for-uac1.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 61ac51301e6c6d4ed977d7674ce2b8e713619a9b Mon Sep 17 00:00:00 2001
From: Torstein Hegge <hegge@xxxxxxxxxxx>
Date: Tue, 19 Mar 2013 17:12:14 +0100
Subject: ALSA: usb: Parse UAC2 extension unit like for UAC1
From: Torstein Hegge <hegge@xxxxxxxxxxx>
commit 61ac51301e6c6d4ed977d7674ce2b8e713619a9b upstream.
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@xxxxxxxxxxx>
Acked-by: Daniel Mack <zonque@xxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/mixer.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -725,7 +725,8 @@ static int check_input_term(struct mixer
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 &&
@@ -2051,6 +2052,8 @@ static int parse_audio_unit(struct mixer
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;
Patches currently in stable-queue which might be from hegge@xxxxxxxxxxx are
queue-3.8/alsa-usb-parse-uac2-extension-unit-like-for-uac1.patch
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