linux-kernel - Re: Threaded interrupt handlers broken?

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Message-ID: <alpine.LFD.2.00.0908171255570.2782@localhost.localdomain>
Date:	Mon, 17 Aug 2009 12:56:55 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Michael Buesch <mb@...sch.de>
cc:	linux-kernel@...r.kernel.org
Subject: Re: Threaded interrupt handlers broken?

On Mon, 17 Aug 2009, Michael Buesch wrote:
> Ok, I added some more debugging code:
> http://bu3sch.de/patches/wireless-testing/20090817-1219/patches/001-hack-threaded-irqs.patch
> 
> Here's the result:
> http://bu3sch.de/misc/dmesg2
>
> Is it possible that the irq_to_desc() in irq_thread() fails and the
> resulting desc pointer points to something random? That could
> probably explain why the bit is set and why the spinlock is
> uninitialized. But it would not explain why desc->lock would still
> work... Maybe irq_to_desc() returns a descriptor to another irq (!=
> 52)?

That would cause the whole irq code to fail. Can you send/upload your
.config please ?

Thanks,

	tglx
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