linux-kernel - Re: [PATCH] [MIPS] vr41xx: unsigned irq cannot be negative

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Date:	Tue, 16 Sep 2008 14:44:21 +0400
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	roel kluin <roel.kluin@...il.com>
Cc:	ralf@...ux-mips.org, yoichi_yuasa@...peaks.co.jp,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [MIPS] vr41xx: unsigned irq cannot be negative

Hello.

roel kluin wrote:

> unsigned irq cannot be negative
>
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> ---
> diff --git a/arch/mips/vr41xx/common/irq.c b/arch/mips/vr41xx/common/irq.c
> index cba36a2..92dd1a0 100644
> --- a/arch/mips/vr41xx/common/irq.c
> +++ b/arch/mips/vr41xx/common/irq.c
> @@ -72,6 +72,7 @@ static void irq_dispatch(unsigned int irq)
>  	cascade = irq_cascade + irq;
>  	if (cascade->get_irq != NULL) {
>  		unsigned int source_irq = irq;
> +		int ret;
>   

   Keep an empty line after the declaration block please.

> @@ -79,8 +80,9 @@ static void irq_dispatch(unsigned int irq)
>  			desc->chip->mask(source_irq);
>  			desc->chip->ack(source_irq);
>  		}
> -		irq = cascade->get_irq(irq);
> -		if (irq < 0)
> +		ret = cascade->get_irq(irq);
> +		irq = ret;
> +		if (ret < 0)
>  			atomic_inc(&irq_err_count);
>  		else
>  			irq_dispatch(irq);
>   

  How about this:

		ret = cascade->get_irq(irq);
		if (ret < 0)
 			atomic_inc(&irq_err_count);
 		else
 			irq_dispatch(ret);


WBR, Sergei


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