linux-kernel - Re: [PATCH] gpio: bd70528: remove unneeded break

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Date:   Tue, 20 Oct 2020 10:08:00 +0000
From:   "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>
To:     "bgolaszewski@...libre.com" <bgolaszewski@...libre.com>,
        "trix@...hat.com" <trix@...hat.com>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>
CC:     linux-power <linux-power@...rohmeurope.com>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: bd70528: remove unneeded break

Thanks Tom,

On Mon, 2020-10-19 at 12:33 -0700, trix@...hat.com wrote:
> From: Tom Rix <trix@...hat.com>
> 
> A break is not needed if it is preceded by a return
> 
> Signed-off-by: Tom Rix <trix@...hat.com>
> ---
>  drivers/gpio/gpio-bd70528.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-
> bd70528.c
> index 45b3da8da336..931e5765fe92 100644
> --- a/drivers/gpio/gpio-bd70528.c
> +++ b/drivers/gpio/gpio-bd70528.c
> @@ -71,17 +71,14 @@ static int bd70528_gpio_set_config(struct
> gpio_chip *chip, unsigned int offset,
>  					  GPIO_OUT_REG(offset),
>  					  BD70528_GPIO_DRIVE_MASK,
>  					  BD70528_GPIO_OPEN_DRAIN);
> -		break;
My personal taste is also to omit these breaks but I am pretty sure I
saw some tooling issuing a warning about falling through the switch-
case back when I wrote this. Most probably checkpatch didn't like that
back then. Anyways - if you have no warnings from any of the tools -
this indeed looks better (to me) without the break :)

>  	case PIN_CONFIG_DRIVE_PUSH_PULL:
>  		return regmap_update_bits(bdgpio->chip.regmap,
>  					  GPIO_OUT_REG(offset),
>  					  BD70528_GPIO_DRIVE_MASK,
>  					  BD70528_GPIO_PUSH_PULL);
> -		break;
>  	case PIN_CONFIG_INPUT_DEBOUNCE:
>  		return bd70528_set_debounce(bdgpio, offset,
>  					    pinconf_to_config_argument(
> config));
> -		break;
>  	default:

Actually - my personal taste would be to also get rid of the empty
default here - but I guess it was also added to make some tool happy...

>  		break;
>  	}

Acked-by: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>