[ALSA - driver 0001093]: snd-usb-audio device link is wrong

[bugtrack@alsa-project.org]

The following issue has been SUBMITTED.
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<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1093> 
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Reported By:                davidz
Assigned To:                Clemens Ladisch
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Project:                    ALSA - driver
Issue ID:                   1093
Category:                   USB - usb-audio
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     assigned
Distribution:               Fedora
Kernel Version:             2.6.12-rc3
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Date Submitted:             05-06-2005 23:43 CEST
Last Modified:              05-06-2005 23:43 CEST
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Summary:                    snd-usb-audio device link is wrong
Description: 

When using my USB Plantronics headset (which works fine), there is a minor
cosmetic bug

        [davidz <at> daxter hal]$ ls -l /sys/class/sound/pcmC2D0c/
        total 0
        -r--r--r--  1 root root 4096 Apr 29 16:57 dev
        lrwxrwxrwx  1 root root    0 Apr 29 16:57 device ->
../../../devices/pci0000:00/0000:00:1d.1/usb3/3-2
        [davidz <at> daxter hal]$ ls -l /sys/class/sound/pcmC2D0c/device/
        total 0
        drwxr-xr-x  3 root root    0 Apr 29 16:57 3-2:1.0
        drwxr-xr-x  3 root root    0 Apr 29 16:57 3-2:1.1
        drwxr-xr-x  3 root root    0 Apr 29 16:57 3-2:1.2
        drwxr-xr-x  3 root root    0 Apr 29 16:57 3-2:1.3

However,

        [davidz <at> daxter hal]$ tree
/sys/bus/usb/drivers/snd-usb-audio/
        /sys/bus/usb/drivers/snd-usb-audio/
        |-- 3-2:1.0 ->
../../../../devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.0
        |-- 3-2:1.1 ->
../../../../devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.1
        |-- 3-2:1.2 ->
../../../../devices/pci0000:00/0000:00:1d.1/usb3/3-2/3-2:1.2
        `-- module -> ../../../../module/snd_usb_audio

Thus, the 'device' symlink in /sys/class/sound/pcmC2D0c/ appears to be
wrong - it needs to point at the USB interface - not the USB device. This
is with ALSA in 2.6.12-rc3. Should be a one line fix. See also

 http://article.gmane.org/gmane.linux.hotplug.devel/7714
 http://article.gmane.org/gmane.linux.hotplug.devel/7717

Thanks,
David
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Issue History
Date Modified  Username       Field                    Change              
======================================================================
05-06-05 23:43 davidz         New Issue                                    
05-06-05 23:43 davidz         Distribution              => Fedora          
05-06-05 23:43 davidz         Kernel Version            => 2.6.12-rc3      
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