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Date: Wed, 19 Mar 2003 18:17:42 -0500 (EST)
From: Zwane Mwaikambo <zwane@holomorphy.com>
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To: Linux Kernel <linux-kernel@vger.kernel.org>
cc: Linus Torvalds <torvalds@transmeta.com>, Ingo Molnar <mingo@elte.hu>,
       Andi Kleen <ak@suse.de>
Subject: Re: [PATCH][2.5] Fail setup_irq for unconfigured IRQs
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On Wed, 19 Mar 2003, Zwane Mwaikambo wrote:

> This patch makes us bail out in case we may have an interrupt which 
> couldn't be associated with an interrupt controller. Without this we allow 
> unconfigured interrupts to be assigned and then later on we get 
> "unexpected IRQ trap at vector xx" during the ack phase.
> 
> scenario:
> This can occur if we fail irq setup during setup_IO_APIC_irqs for some 
> reason or other and then miss getting assigned a vector. Later on we then 
> get assigned no_irq_type as our handler.

Here is a sample /proc/interrupts from an affected system...

 41:       1313        796       1298       1380          IO-APIC-level  qlogicisp
 89:          0          0          0          0          none  qlogicisp

Please apply,
	Zwane

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