kern/46791: eso(4) kernel panic while booting -current

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         46791
>Category:       kern
>Synopsis:       eso(4) kernel panic while booting -current
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Aug 11 14:30:00 +0000 2012
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date 2012.08.10.05.22.22
>Organization:

>Environment:
System: NetBSD guava.gson.org 5.0.1 NetBSD 5.0.1 (GENERIC) #0: Thu Jul 30 
01:39:11 UTC 2009 
builds%b8.netbsd.org@localhost:/home/builds/ab/netbsd-5-0-1-RELEASE/i386/200907292356Z-obj/home/builds/ab/netbsd-5-0-1-RELEASE/src/sys/arch/i386/compile/GENERIC
 i386
Architecture: i386
Machine: i386
>Description:

I tried booting a -current kernel on a NEC Versa Daylite, and it
paniced during boot with the following message (manually transcribed,
omitting some verbosity):

  eso0 at pci0 dev 4 function 0: ESS Solo-1 PCI AudioDrive ES1496 Revision E
  panic: kernel diagnostic assertion "mutex_owned(&sc->sc_intr_lock)" failed: 
file "/bracket/prod/2012.08.10.05.22.22/src/sys/dev/pci/eso.c", line 580
  fatal breakpoint trap in supervisor mode
  ...
  db{0}> bt
  ...
  eso_write_mixreg(...)
  eso_attach(...)

This looks related to PR kern/46451.

>How-To-Repeat:

>Fix: