tree 34cddff9b3b8efcc3a60a6e9d0a3e001a714d364
parent 7b6717e144de6592e614fd7fc3b914b6bf686a9d
author Clemens Ladisch <clemens@ladisch.de> 1283503991 +0200
committer Takashi Iwai <tiwai@suse.de> 1283546199 +0200

ALSA: usb-audio: fix detection of vendor-specific device protocol settings

The Audio Class v2 support code in 2.6.35 added checks for the
bInterfaceProtocol field.  However, there are devices (usually those
detected by vendor-specific quirks) that do not have one of the
predefined values in this field, which made the driver reject them.

To fix this regression, restore the old behaviour, i.e., assume that
a device with an unknown bInterfaceProtocol field (other than
UAC_VERSION_2) has more or less UAC-v1-compatible descriptors.

[compile warning fixes by tiwai]

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>