linux-kernel - Re: [PATCH] watchdog: ts72xx_wdt: Kill superfluous variable in remove

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Date:	Tue, 19 Aug 2014 07:59:16 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Wim Van Sebroeck <wim@...ana.be>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] watchdog: ts72xx_wdt: Kill superfluous variable in remove

On Tue, Aug 19, 2014 at 02:57:12PM +0300, Mika Westerberg wrote:
> There is no need to store the return value of misc_deregister() in a
> variable. Instead we can just return the value directly.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---
>  drivers/watchdog/ts72xx_wdt.c | 6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/watchdog/ts72xx_wdt.c b/drivers/watchdog/ts72xx_wdt.c
> index afa9d6ef353a..dee9c6cbe6df 100644
> --- a/drivers/watchdog/ts72xx_wdt.c
> +++ b/drivers/watchdog/ts72xx_wdt.c
> @@ -428,11 +428,7 @@ static int ts72xx_wdt_probe(struct platform_device *pdev)
>  
>  static int ts72xx_wdt_remove(struct platform_device *pdev)
>  {
> -	int error;
> -
> -	error = misc_deregister(&ts72xx_wdt_miscdev);
> -
> -	return error;
> +	return misc_deregister(&ts72xx_wdt_miscdev);

Is that worth it, and does it even reduce code size ?
Converting the driver to use the watchdog infrastructure would make much more sense
(if someone can test the result).

Guenter
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