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

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Message-ID: <20170119162442.Horde.0gCiElFw7JW8tutB4C5x_4H@gator4166.hostgator.com>
Date:   Thu, 19 Jan 2017 16:24:42 -0600
From:   "Gustavo A. R. Silva" <garsilva@...eddedor.com>
To:     Sebastian Reichel <sre@...nel.org>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers: power: supply: Compress return logic into one
 line.

Hey hello,

Quoting Sebastian Reichel <sre@...nel.org>:

> 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.
>

Awesome, thanks!
--
Gustavo A. R. Silva