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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Stefan Lengfeld <s.lengfeld@phytec.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH] commands: spi: fix chip select validation
Date: Tue, 8 Nov 2016 08:56:03 +0100	[thread overview]
Message-ID: <20161108075603.7o42xbpmspomojwh@pengutronix.de> (raw)
In-Reply-To: <1478531456-11232-1-git-send-email-s.lengfeld@phytec.de>

On Mon, Nov 07, 2016 at 04:10:56PM +0100, Stefan Lengfeld wrote:
> The chip selects are numbered 0..(max chip selects - 1). Chip select
> with number <max chip selects> is invalid. Fix the check for that. Using
> the out of bound chip select may hang your board.
> 
> Signed-off-by: Stefan Lengfeld <s.lengfeld@phytec.de>
> ---
>  commands/spi.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks

Sascha

> 
> diff --git a/commands/spi.c b/commands/spi.c
> index 21db9ae..6603b34 100644
> --- a/commands/spi.c
> +++ b/commands/spi.c
> @@ -68,8 +68,8 @@ static int do_spi(int argc, char *argv[])
>  		return -ENODEV;
>  	}
>  
> -	if (spi.chip_select > spi.master->num_chipselect) {
> -		printf("spi chip select (%d)> master num chipselect (%d)\n",
> +	if (spi.chip_select >= spi.master->num_chipselect) {
> +		printf("spi chip select (%d) >= master num chipselect (%d)\n",
>  			spi.chip_select, spi.master->num_chipselect);
>  		return -EINVAL;
>  	}
> -- 
> 1.9.1
> 
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

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      reply	other threads:[~2016-11-08  7:56 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-07 15:10 Stefan Lengfeld
2016-11-08  7:56 ` Sascha Hauer [this message]

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