linux-kernel - Re: [PATCH] stating: otus: fix compile warning and some style issues

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Date:	Sun, 08 Aug 2010 17:17:56 +0200
From:	walter harms <wharms@....de>
To:	Roberto Rodriguez Alkala <rralcala@...il.com>
CC:	Greg Kroah-Hartman <gregkh@...e.de>, Joe Perches <joe@...ches.com>,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] stating: otus: fix compile warning and some style issues



Roberto Rodriguez Alkala schrieb:
> In today linux-next I got a compile warning in staging/otus driver. 
> This patch solves the issue and also improves the coding style.
> 
> Signed-off-by: Roberto Rodriguez Alcala <rralcala@...il.com>
> ---
>  drivers/staging/otus/80211core/ratectrl.c |   26 +++++++++-----------------
>  1 files changed, 9 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/staging/otus/80211core/ratectrl.c b/drivers/staging/otus/80211core/ratectrl.c
> index a1abe2f..283b2b5 100644
> --- a/drivers/staging/otus/80211core/ratectrl.c
> +++ b/drivers/staging/otus/80211core/ratectrl.c
> @@ -422,23 +422,15 @@ u8_t zfRateCtrlRateDiff(struct zsRcCell* rcCell, u8_t retryRate)
>      u16_t i;
>  
>      /* Find retryRate in operationRateSet[] */
> -    for (i=0; i<rcCell->operationRateCount; i++)
> -    {
> -        if (retryRate == rcCell->operationRateSet[i])
> -        {
> -            if (i < rcCell->currentRateIndex)
> -            {
> -                return ((rcCell->currentRateIndex - i)+1)>>1;
> -            }
> -            else if (i == rcCell->currentRateIndex == 0)
> -            {
> -                return 1;
> -            }
> -            else
> -            {
> -                return 0;
> -            }
> -        }
> +    for (i = 0; i < rcCell->operationRateCount; i++) {
> +	if (retryRate == rcCell->operationRateSet[i]) {
> +		if (i < rcCell->currentRateIndex)
> +			return ((rcCell->currentRateIndex - i)+1)>>1;
> +		else if (i == rcCell->currentRateIndex && i == 0)
> +			return 1;
> +		else
> +			return 0;
> +	}
>      }
>      /* TODO : retry rate not in operation rate set */
>      zm_msg1_tx(ZM_LV_0, "Not in operation rate set:", retryRate);


mmh, it is a matter of taste but to improve readablity
i would make the special case i=0 first and let the  loop
start with i=1. /* untested code below, assuming rcCell->currentRateIndex>=0 */

 if ( retryRate == rcCell->operationRateSet[0] && rcCell->currentRateIndex== 0 )
	return 1;

  for (i = 1; i < rcCell->operationRateCount; i++) {
               if (i < rcCell->currentRateIndex)
                  return ((rcCell->currentRateIndex - i)+1)>>1;
               else
                  return 0;
   }



just my 2 cents,

re,
 wh
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