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    Subject[patch 15/54] ALSA: usb-audio: explicitly match Logitech QuickCam
    -stable review patch.  If anyone has any objections, please let us know.
    ---------------------

    From: Daniel Drake <dsd@gentoo.org>

    Commit 93c8bf45e083b89dffe3a708363c15c1b220c723 modified the USB device
    matching behaviour to ignore interface class matches if the device class
    is vendor-specific.
    This patch adds explicit ID matches for Logitech QuickCam devices, which
    have a vendor specific device class (but standards-compliant audio
    interfaces).
    This fixes a 2.6.20 regression where the audio component of these
    devices was no longer usable.
    http://bugs.gentoo.org/show_bug.cgi?id=175715
    https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/93822
    https://bugtrack.alsa-project.org/alsa-bug/view.php?id=3040
    Based on a patch from sergiom

    Signed-off-by: Daniel Drake <dsd@gentoo.org>
    Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
    Signed-off-by: Jaroslav Kysela <perex@suse.cz>
    Signed-off-by: Chris Wright <chrisw@sous-sol.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    ---
    X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftorvalds%2Flinux-2.6.git;a=commitdiff_plain;h=a91214589e6527b18f52bc0b31253f9dfb4665e6

    sound/usb/usbquirks.h | 23 +++++++++++++++++++++++
    1 file changed, 23 insertions(+)

    --- linux-2.6.21.4.orig/sound/usb/usbquirks.h
    +++ linux-2.6.21.4/sound/usb/usbquirks.h
    @@ -40,6 +40,29 @@
    .bInterfaceClass = USB_CLASS_VENDOR_SPEC

    /*
    + * Logitech QuickCam: bDeviceClass is vendor-specific, so generic interface
    + * class matches do not take effect without an explicit ID match.
    + */
    +{
    + .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
    + USB_DEVICE_ID_MATCH_INT_CLASS |
    + USB_DEVICE_ID_MATCH_INT_SUBCLASS,
    + .idVendor = 0x046d,
    + .idProduct = 0x08f0,
    + .bInterfaceClass = USB_CLASS_AUDIO,
    + .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL
    +},
    +{
    + .match_flags = USB_DEVICE_ID_MATCH_DEVICE |
    + USB_DEVICE_ID_MATCH_INT_CLASS |
    + USB_DEVICE_ID_MATCH_INT_SUBCLASS,
    + .idVendor = 0x046d,
    + .idProduct = 0x08f6,
    + .bInterfaceClass = USB_CLASS_AUDIO,
    + .bInterfaceSubClass = USB_SUBCLASS_AUDIO_CONTROL
    +},
    +
    +/*
    * Yamaha devices
    */

    --
    -
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