• Clemens Ladisch's avatar
    ALSA: usb-audio: fix detection of vendor-specific device protocol settings · a2acad82
    Clemens Ladisch authored
    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: default avatarClemens Ladisch <clemens@ladisch.de>
    Cc: Daniel Mack <daniel@caiaq.de>
    Cc: <stable@kernel.org>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
endpoint.c 12.9 KB