usb/174835: uaudio fails to create pcm/dsp device file

[Martin Laabs]

>Number:         174835
>Category:       usb
>Synopsis:       uaudio fails to create pcm/dsp device file
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Dec 30 16:30:00 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Martin Laabs
>Release:        9.0-RELEASE-p3/9.1-RC3
>Organization:
-
>Environment:
FreeBSD pc.martinlaabs.de 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64

>Description:
Ŵhen attaching my USB soundcard the kernel detects the device to be handles by the uaudio driver. It detects it correct as you can see in the dmesg-log below. 
The driver also creates a mixer device (mixer3 in my case)
However - it does not create a additional pcm/dsp device to get the actual sound data in and out.
The device worked for me in 8.0 versions of BSD without problems.

-------------:<--------------
ugen0.2: <vendor 0x0d8c> at usbus0
uaudio0: <vendor 0x0d8c USB Sound Device, class 0/0, rev 1.10/0.10, addr 2> on usbus0
uaudio0: Play: 48000 Hz, 2 ch, 16-bit S-LE PCM format
uaudio0: Record: 48000 Hz, 2 ch, 16-bit S-LE PCM format
uaudio0: No midi sequencer
pcm2: <USB audio> on uaudio0
uhid2: <vendor 0x0d8c USB Sound Device, class 0/0, rev 1.10/0.10, addr 2> on usbus0
-------------:<--------------
>How-To-Repeat:
Attach a device supported by uaudio and look for a new created dsp device
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: