linux-kernel - Re: [PATCH] regulator, mc13xxx: Remove pointless test for unsigned less than zero

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Date:	Fri, 25 Feb 2011 08:55:13 +0000
From:	Liam Girdwood <lrg@...mlogic.co.uk>
To:	Jesper Juhl <jj@...osbits.net>
Cc:	linux-kernel@...r.kernel.org,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Yong Shen <yong.shen@...aro.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Alberto Panizzo <maramaopercheseimorto@...il.com>
Subject: Re: [PATCH] regulator, mc13xxx: Remove pointless test for unsigned
 less than zero

On Wed, 2011-02-23 at 23:45 +0100, Jesper Juhl wrote:
> The variable 'val' is a 'unsigned int', so it can never be less than zero. 
> This fact makes the "val < 0" part of the test done in BUG_ON() in 
> mc13xxx_regulator_get_voltage() rather pointles since it can never have 
> any effect.
> This patch removes the pointless test.
> 
> Signed-off-by: Jesper Juhl <jj@...osbits.net>
> ---
>  mc13xxx-regulator-core.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/regulator/mc13xxx-regulator-core.c b/drivers/regulator/mc13xxx-regulator-core.c
> index f53d31b..2bb5de1 100644
> --- a/drivers/regulator/mc13xxx-regulator-core.c
> +++ b/drivers/regulator/mc13xxx-regulator-core.c
> @@ -174,7 +174,7 @@ static int mc13xxx_regulator_get_voltage(struct regulator_dev *rdev)
>  
>  	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
>  
> -	BUG_ON(val < 0 || val > mc13xxx_regulators[id].desc.n_voltages);
> +	BUG_ON(val > mc13xxx_regulators[id].desc.n_voltages);
>  
>  	return mc13xxx_regulators[id].voltages[val];
>  }
> 

Applied.

Thanks

Liam


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