Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a91214589e6527b18f52bc0b31253f9dfb4665e6
Commit:     a91214589e6527b18f52bc0b31253f9dfb4665e6
Parent:     d427c77eb2484c37d76b8e157e2b0b82c9b03062
Author:     Daniel Drake <[EMAIL PROTECTED]>
AuthorDate: Mon May 7 09:27:05 2007 +0200
Committer:  Jaroslav Kysela <[EMAIL PROTECTED]>
CommitDate: Fri May 11 16:56:17 2007 +0200

    [ALSA] usb-audio: explicitly match Logitech QuickCam
    
    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 <[EMAIL PROTECTED]>
    Signed-off-by: Clemens Ladisch <[EMAIL PROTECTED]>
    Signed-off-by: Jaroslav Kysela <[EMAIL PROTECTED]>
---
 sound/usb/usbquirks.h |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/sound/usb/usbquirks.h b/sound/usb/usbquirks.h
index 8582620..8fcbe93 100644
--- a/sound/usb/usbquirks.h
+++ b/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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