linux-kernel - Re: [2.6 patch] arch/i386/kernel/io_apic.c: handle a negative return value

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Date:	Tue, 14 Nov 2006 07:46:52 +0100
From:	Ingo Molnar <mingo@...hat.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	Adrian Bunk <bunk@...sta.de>, linux-kernel@...r.kernel.org
Subject: Re: [2.6 patch] arch/i386/kernel/io_apic.c: handle a negative
	return value

On Mon, 2006-11-13 at 16:42 -0800, Andrew Morton wrote:
>         pin  = find_isa_irq_pin(8, mp_INT);
> +       if (pin == -1) {
> +               printk(KERN_ERR "unlock_ExtINT_logic:
> find_isa_irq_pin()
> +                               "failed\n");
> +               return;
> +       }
>         apic = find_isa_irq_apic(8, mp_INT);
> -       if (pin == -1)
> +       if (apic == -1) {
> +               printk(KERN_ERR "unlock_ExtINT_logic:
> find_isa_irq_apic()
> +                               "failed\n");
>                 return;
> +       } 

as i mentioned it in my mail yesterday, if find_isa_irq_apic() returns
-1 then find_isa_irq_pin() has to return -1 too. But this is obscure and
needs to be documented at least - and your patch is good for
documentation purposes too :-)

Acked-by: Ingo Molnar <mingo@...hat.com>

	Ingo

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