linux-kernel - Re: [PATCH] Input: simplify the return expression of da9034_touch

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Date:   Thu, 12 May 2022 03:25:10 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     cgel.zte@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] Input: simplify the return expression of
 da9034_touch_probe()

On Fri, Apr 29, 2022 at 05:53:00AM +0000, cgel.zte@...il.com wrote:
> From: Minghao Chi <chi.minghao@....com.cn>
> 
> Simplify the return expression.
> 
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
> ---
>  drivers/input/touchscreen/da9034-ts.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/da9034-ts.c b/drivers/input/touchscreen/da9034-ts.c
> index 2943f6a58388..dfb2604381d2 100644
> --- a/drivers/input/touchscreen/da9034-ts.c
> +++ b/drivers/input/touchscreen/da9034-ts.c
> @@ -298,7 +298,6 @@ static int da9034_touch_probe(struct platform_device *pdev)
>  	struct da9034_touch_pdata *pdata = dev_get_platdata(&pdev->dev);
>  	struct da9034_touch *touch;
>  	struct input_dev *input_dev;
> -	int error;
>  
>  	touch = devm_kzalloc(&pdev->dev, sizeof(struct da9034_touch),
>  			     GFP_KERNEL);
> @@ -344,11 +343,7 @@ static int da9034_touch_probe(struct platform_device *pdev)
>  	touch->input_dev = input_dev;
>  	input_set_drvdata(input_dev, touch);
>  
> -	error = input_register_device(input_dev);
> -	if (error)
> -		return error;
> -
> -	return 0;
> +	return input_register_device(input_dev);

In cases where there are multiple checks/exit paths in the same function
I prefer the existing style as it requires less changes when extending.

Thanks,

-- 
Dmitry