linux-kernel - Re: [PATCH] S3C: beyond ARRAY_SIZE of s3c

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Date:	Tue, 26 May 2009 22:57:20 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Roel Kluin <roel.kluin@...il.com>
Cc:	ben-linux@...ff.org, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] S3C: beyond ARRAY_SIZE of s3c_gpios

On Wed, 20 May 2009 17:51:07 +0200 Roel Kluin <roel.kluin@...il.com> wrote:

> Do not go beyond ARRAY_SIZE of s3c_gpios
> 
> Signed-off-by: Roel Kluin <roel.kluin@...il.com>
> ---
> diff --git a/arch/arm/plat-s3c/gpio.c b/arch/arm/plat-s3c/gpio.c
> index d71dd6d..29926c1 100644
> --- a/arch/arm/plat-s3c/gpio.c
> +++ b/arch/arm/plat-s3c/gpio.c
> @@ -28,7 +28,7 @@ static __init void s3c_gpiolib_track(struct s3c_gpio_chip *chip)
>  
>  	gpn = chip->chip.base;
>  	for (i = 0; i < chip->chip.ngpio; i++, gpn++) {
> -		BUG_ON(gpn > ARRAY_SIZE(s3c_gpios));
> +		BUG_ON(gpn >= ARRAY_SIZE(s3c_gpios));
>  		s3c_gpios[gpn] = chip;
>  	}
>  }

umm, OK, but the title and changelog are quite inaccurate.

I rewrote the title to

	s3c: fix check of index into s3c_gpios[]

and rewrote the changelog to

	The check of the s3c_gpios[] index had an off-by-one.

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