port-arm/48805: Audio Driver issues on Pi running NetBSD (2014-05-10) image - hangs audio applications like audioplay

[jun%soum.co.jp@localhost]

>Number:         48805
>Category:       port-arm
>Synopsis:       Audio Driver issues on Pi running NetBSD (2014-05-10) image - 
>hangs audio applications like audioplay
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-arm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue May 13 12:05:00 +0000 2014
>Originator:     Jun Ebihara
>Release:        evbarm-earmhf/201405081300Z
>Organization:
SOUM Corporation
>Environment:
NetBSD rpi 6.99.41 NetBSD 6.99.41 (RPI) #0: Thu May  8 14:53:46 UTC 2014
builds%b43.netbsd.org@localhost:/home/builds/ab/HEAD/evbarm-earmhf/201405081300Z-obj/home/builds/ab/HEAD/src/sys/arch/evbarm/compile/RPI
evbarm

>Description:
Yunis Mustafa reports on port-arm mailinglist:
Date: Mon, 12 May 2014 14:59:03 -0700

- audioplay hangs and ctl-c has no effect on killing it
- Sometimes the following log is printed out on serial console when this
happens:
    vcaudio0: WARNING: count = 11472

>How-To-Repeat:
1. RPI boot with 
ftp://ftp.netbsd.org/pub/NetBSD/misc/jun/raspberry-pi/2014-05-10-earmhf/2014-05-10-netbsd-raspi.img.gz
2. login root with no password
3. run audioplay.and sometimes hangs with vcaudio0: WARNING: count = XXXX
audioplay /usr/pkg/share/mikutter/core/skin/data/sounds/mikutter-se.wav

http://movapic.com/ebijun/pic/5140170

>Fix: