linux-kernel - Re: [PATCH 1/2] mfd: twl4030-power: do not allow negative or zero length script

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Date:	Mon, 19 Oct 2009 18:37:16 +0200
From:	Samuel Ortiz <sameo@...ux.intel.com>
To:	Aaro Koskinen <aaro.koskinen@...ia.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mfd: twl4030-power: do not allow negative or zero
 length script

Hi Aaro,

On Wed, Oct 14, 2009 at 03:15:49PM +0300, Aaro Koskinen wrote:
> The script length cannot be negative. If the length is zero, return
> an error.
> 
> The patch eliminates the following compiler warning:
Out of curiosity, which toolchain are you using ? I cross compile my mfd tree
for ARM, and I dont get this error...

 
> drivers/mfd/twl4030-power.c: In function 'twl4030_power_init':
twl4030_power_init ? Isnt it twl4030_write_script ?

Cheers,
Samuel.


> drivers/mfd/twl4030-power.c:151: warning: 'err' may be used uninitialized in this function
> drivers/mfd/twl4030-power.c:151: note: 'err' was declared here
> 
> Signed-off-by: Aaro Koskinen <aaro.koskinen@...ia.com>
> ---
>  drivers/mfd/twl4030-power.c |    4 ++--
>  1 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
> index d423e0c..eae6cda 100644
> --- a/drivers/mfd/twl4030-power.c
> +++ b/drivers/mfd/twl4030-power.c
> @@ -146,9 +146,9 @@ out:
>  }
>  
>  static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
> -				       int len)
> +				       unsigned len)
>  {
> -	int err;
> +	int err = EINVAL;
>  
>  	for (; len; len--, address++, script++) {
>  		if (len == 1) {
> -- 
> 1.6.0.4
> 

-- 
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