linux-kernel - Re: [PATCH] drivers: power: supply: Compress return logic into one line.

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Date:   Tue, 17 Jan 2017 00:42:19 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     "Gustavo A. R. Silva" <garsilva@...eddedor.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: power: supply: Compress return logic into one
 line.

Hi,

On Wed, Jan 11, 2017 at 08:29:35PM -0600, Gustavo A. R. Silva wrote:
> Simplify return logic to avoid unnecessary variable assignments.
> These issues were detected using Coccinelle and the following semantic patch:
> 
> @@
> local idexpression ret;
> expression e;
> @@
> 
> -ret =
> +return
>      e;
> -return ret;
> 
> Signed-off-by: Gustavo A. R. Silva <garsilva@...eddedor.com>
> ---
>  drivers/power/supply/ab8500_btemp.c | 10 +++-------
>  1 file changed, 3 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/power/supply/ab8500_btemp.c b/drivers/power/supply/ab8500_btemp.c
> index 6ffdc18..9b01b52 100644
> --- a/drivers/power/supply/ab8500_btemp.c
> +++ b/drivers/power/supply/ab8500_btemp.c
> @@ -123,10 +123,7 @@ static LIST_HEAD(ab8500_btemp_list);
>   */
>  struct ab8500_btemp *ab8500_btemp_get(void)
>  {
> -	struct ab8500_btemp *btemp;
> -	btemp = list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node);
> -
> -	return btemp;
> +	return list_first_entry(&ab8500_btemp_list, struct ab8500_btemp, node);
>  }
>  EXPORT_SYMBOL(ab8500_btemp_get);
>  
> @@ -470,7 +467,7 @@ static int ab8500_btemp_get_batctrl_res(struct ab8500_btemp *di)
>  static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di,
>  	const struct abx500_res_to_temp *tbl, int tbl_size, int res)
>  {
> -	int i, temp;
> +	int i;
>  	/*
>  	 * Calculate the formula for the straight line
>  	 * Simple interpolation if we are within
> @@ -488,9 +485,8 @@ static int ab8500_btemp_res_to_temp(struct ab8500_btemp *di,
>  			i++;
>  	}
>  
> -	temp = tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) *
> +	return tbl[i].temp + ((tbl[i + 1].temp - tbl[i].temp) *
>  		(res - tbl[i].resist)) / (tbl[i + 1].resist - tbl[i].resist);
> -	return temp;
>  }
>  
>  /**

Thanks, queued.

-- Sebastian

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