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Date: Wed, 7 Nov 2001 10:40:44 +0100
From: Jan Marek <linux@hazard.jcu.cz>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: dwmw2@infradead.org
Subject: Re: Cannot unlock spinlock... Was: Problem in yenta.c, 2nd edition
Message-ID: <20011107104044.C11351@hazard.jcu.cz>
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Hallo l-k,

On Tue, Nov 06, 2001 at 10:40:49PM +0000, David Woodhouse wrote:
> 
> linux@hazard.jcu.cz said:
> >  The last message I got from kernel is:  request_irq: desc->handler->
> > startup(irq)
> 
> > Then problem is in the spin_unlock_irqrestore()???
> 
> > Any ideas, recomendations, suggestions?
> 
> It's dying in an IRQ storm. Something is permanently asserting IRQ 11, and 
> unless you can work out what's doing it and make it stop, the machine will 
> die whenever you enable that IRQ.
> 
> Try this hack, just to make sure:

Your hack is working for me. I got message:
"IRQ storm detected on IRQ 11. Disabling"

and everythink works OK. Spinlock was unlocked, procedure
setup_irq() ended and PCMCIA package works fine...

It is possible to add your patch to the kernel?

But I don't know, what device asserted IRQ 11 to start the IRQ
storm... When I was in the function setup_irq(), I installed the
first routine to work with IRQ 11 in its IRQ queue...

Or maybe will be safe to disable concrete IRQ, when is installed
a new handler for it?

I'm sorry, I'm not kernel programmer at all, I still thinking
about it... Maybe will be my think usefull for you...

> 
> --
> dwmw2

Sincerely
Jan Marek
-- 
Ing. Jan Marek
University of South Bohemia
Academic Computer Centre
Phone: +420-38-7772080