panic when using mpd on evbarm/kirkwood

[Sébastien BOCAHU <lists%zecrazytux.net@localhost>]

Hi,

I'm using NetBSD 6.0.1 on an OpenRD-Base evaluation platform (Marvell
kirkwood SoC)

The kernel is a little patched, for supporting USB isochronous transfert
translations, wich is needed in order to support my USB1.1 DAC (the kirkwood
platform only has a EHCI driver).

(I was provided with a patch from Masao, who had worked on supporting 
isochronous TT a few years ago 
(http://mail-index.netbsd.org/tech-kern/2011/05/10/msg010521.html))

When I launch mpd and start playing music, the kernel panics with the following
message:

  panic: pool 'pvepl' is IPL_NONE, but called from interrupt context
  
  Stopped in pid 0.3 (system) at  netbsd:cpu_Debugger+0x4:        bx      r14 
  db> 


I have no idea whether it is related to the TT patch or not, and how to debug
it. This crash does not happen when using mpg123.

Any hint would be greatly appreciated !
Thanks,

-- 
Sébastien Bocahu