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Date: Fri, 7 Jul 2006 01:23:30 -0700
From: Andrew Morton <akpm@osdl.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: Re: G5 troubles booting powerpc-git (July 6)
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On Fri, 07 Jul 2006 08:56:27 +1000
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:

> If you look at arch/powerpc/kernel/irq.c from line 479:
> 
> 	/* Check if mapping already exist, if it does, call
> 	 * host->ops->map() to update the flags
> 	 */
> 	virq = irq_find_mapping(host, hwirq);
> 	if (virq != IRQ_NONE) {
> 		pr_debug("irq: -> existing mapping on virq %d\n", virq);
> 		host->ops->map(host, virq, hwirq, flags);
> 		return virq;
> 	}
> 
> What if you comment out the host->ops->map(...) call in there ? Does it
> help ?

No, there's no change in behaviour.