linux-kernel - Re: [PATCH] pinctrl: Delete unnecessary checks before the function call "pinctrl

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Date:	Thu, 5 Nov 2015 08:53:45 -0800
From:	Ray Jui <rjui@...adcom.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	Jon Mason <jonmason@...adcom.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	"Scott Branden" <sbranden@...adcom.com>,
	<linux-gpio@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<bcm-kernel-feedback-list@...adcom.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	<kernel-janitors@...r.kernel.org>,
	Julia Lawall <julia.lawall@...6.fr>,
	Pramod Kumar <pramodku@...adcom.com>
Subject: Re: [PATCH] pinctrl: Delete unnecessary checks before the function
 call "pinctrl_unregister"


On 11/5/2015 8:17 AM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Thu, 5 Nov 2015 17:10:22 +0100
>
> The pinctrl_unregister() function tests whether its argument is NULL
> and then returns immediately. Thus the test around the call is not needed.
>
> This issue was detected by using the Coccinelle software.
>
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>   drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c | 3 +--
>   drivers/pinctrl/pinctrl-single.c          | 5 +----
>   2 files changed, 2 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> index 12a48f4..663ad0a 100644
> --- a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> @@ -638,8 +638,7 @@ static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
>
>   static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
>   {
> -	if (chip->pctl)
> -		pinctrl_unregister(chip->pctl);
> +	pinctrl_unregister(chip->pctl);
>   }
>
>   struct cygnus_gpio_data {
> diff --git a/drivers/pinctrl/pinctrl-single.c b/drivers/pinctrl/pinctrl-single.c
> index ef04b96..d24e5f1 100644
> --- a/drivers/pinctrl/pinctrl-single.c
> +++ b/drivers/pinctrl/pinctrl-single.c
> @@ -1484,10 +1484,7 @@ static void pcs_irq_free(struct pcs_device *pcs)
>   static void pcs_free_resources(struct pcs_device *pcs)
>   {
>   	pcs_irq_free(pcs);
> -
> -	if (pcs->pctl)
> -		pinctrl_unregister(pcs->pctl);
> -
> +	pinctrl_unregister(pcs->pctl);
>   	pcs_free_funcs(pcs);
>   	pcs_free_pingroups(pcs);
>   }
>

The change looks good to me, thanks!

Reviewed-by: Ray Jui <rjui@...adcom.com>

+ Pramod since he's working on changes on the pinctrl-cygnus-gpio driver.

Ray
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