linux-kernel - Re: [PATCH v2] Drivers: Misc: fix warnings, unsigned long will never

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Date:	Wed, 08 May 2013 10:24:44 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	Greg KH <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org >> \"linux-kernel@...r.kernel.org\"" 
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] Drivers: Misc: fix warnings, unsigned long will never
 < 0

Hello Maintainers:

Please help check, when you have time.

Thanks.

On 2013年04月07日 11:28, Chen Gang wrote:
> 
>   val is unsigned long which never < 0
> 
> Signed-off-by: Chen Gang <gang.chen@...anux.com>
> ---
>  drivers/misc/tsl2550.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c
> index 1e7bc0e..5bf9448 100644
> --- a/drivers/misc/tsl2550.c
> +++ b/drivers/misc/tsl2550.c
> @@ -204,7 +204,7 @@ static ssize_t tsl2550_store_power_state(struct device *dev,
>  	unsigned long val = simple_strtoul(buf, NULL, 10);
>  	int ret;
>  
> -	if (val < 0 || val > 1)
> +	if (val > 1)
>  		return -EINVAL;
>  
>  	mutex_lock(&data->update_lock);
> @@ -236,7 +236,7 @@ static ssize_t tsl2550_store_operating_mode(struct device *dev,
>  	unsigned long val = simple_strtoul(buf, NULL, 10);
>  	int ret;
>  
> -	if (val < 0 || val > 1)
> +	if (val > 1)
>  		return -EINVAL;
>  
>  	if (data->power_state == 0)
> 


-- 
Chen Gang

Asianux Corporation
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