From: Clemens Ladisch <clemens@ladisch.de>
Date: Thu, 29 Nov 2012 16:04:23 +0000 (+0100)
Subject: ALSA: usb-audio: fix invalid length check for RME and other UAC 2 devices
X-Git-Tag: v3.8-rc6~9^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d56268fb108c7c21e19933588ca4d94652585183;p=pandora-kernel.git

ALSA: usb-audio: fix invalid length check for RME and other UAC 2 devices

Commit 23caaf19b11e (ALSA: usb-mixer: Add support for Audio Class v2.0)
forgot to adjust the length check for UAC 2.0 feature unit descriptors.
This would make the code abort on encountering a feature unit without
per-channel controls, and thus prevented the driver to work with any
device having such a unit, such as the RME Babyface or Fireface UCX.

Reported-by: Florian Hanisch <fhanisch@uni-potsdam.de>
Tested-by: Matthew Robbetts <wingfeathera@gmail.com>
Tested-by: Michael Beer <beerml@sigma6audio.de>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: 2.6.35+ <stable@vger.kernel.org>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---

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