From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Fri, 4 Mar 2011 09:11:21 +0100
From: Richard Cochran <richardcochran@domain.hid>
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Subject: Re: [Xenomai-help] Stuck MSI in normal Linux driver
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To: Philippe Gerum <rpm@xenomai.org>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>, Jan Kiszka <jan.kiszka@domain.hid>

On Fri, Mar 04, 2011 at 08:51:00AM +0100, Philippe Gerum wrote:
> 
> I'm not saying this would be impossible to enable MSIs there, I'm just
> saying that so far: nobody cared. Terrae incognitae.

I care!

When the first MSI interrupt from my PCIe card should arrive, running
on a P2020RBD, the machine locks up. My BDI shows me that both cores
are going round in circles.

* core 1
  __ipipe_check_percpu_access ()  at kernel/ipipe/core.c:2067
  ipipe_suspend_domain ()         at kernel/ipipe/core.c:826
  __ipipe_check_percpu_access ()  at arch/powerpc/include/asm/ipipe_hwirq.h:57
  ipipe_suspend_domain ()         at kernel/ipipe/core.c:860
  cpu_idle ()                     at arch/powerpc/kernel/idle.c:64
  ipipe_suspend_domain ()         at arch/powerpc/include/asm/ipipe_hwirq.h:57

* core 2
  ipipe_suspend_domain ()         at kernel/ipipe/core.c:858
  cpu_idle ()                     at arch/powerpc/kernel/idle.c:64
  ipipe_suspend_domain ()         at arch/powerpc/include/asm/ipipe_hwirq.h:57

Any thoughts?

Thanks,

Richard