linux-kernel - Re: [RFT PATCH 2/3] gpio: eic-sprd: use a helper variable for &pdev->dev

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Date:   Tue, 12 Sep 2023 18:07:15 +0800
From:   Baolin Wang <baolin.wang@...ux.alibaba.com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy@...nel.org>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFT PATCH 2/3] gpio: eic-sprd: use a helper variable for
 &pdev->dev



On 9/12/2023 5:45 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> 
> Instead of dereferencing pdev everywhere, just store the address of the
> underlying struct device in a local variable.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

Reviewed-by: Baolin Wang <baolin.wang@...ux.alibaba.com>

> ---
>   drivers/gpio/gpio-eic-sprd.c | 20 ++++++++++----------
>   1 file changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
> index 9b2f9ccf8d77..be7f2fa5aa7b 100644
> --- a/drivers/gpio/gpio-eic-sprd.c
> +++ b/drivers/gpio/gpio-eic-sprd.c
> @@ -591,18 +591,19 @@ static void sprd_eic_unregister_notifier(void *data)
>   static int sprd_eic_probe(struct platform_device *pdev)
>   {
>   	const struct sprd_eic_variant_data *pdata;
> +	struct device *dev = &pdev->dev;
>   	struct gpio_irq_chip *irq;
>   	struct sprd_eic *sprd_eic;
>   	struct resource *res;
>   	int ret, i;
>   
> -	pdata = of_device_get_match_data(&pdev->dev);
> +	pdata = of_device_get_match_data(dev);
>   	if (!pdata) {
> -		dev_err(&pdev->dev, "No matching driver data found.\n");
> +		dev_err(dev, "No matching driver data found.\n");
>   		return -EINVAL;
>   	}
>   
> -	sprd_eic = devm_kzalloc(&pdev->dev, sizeof(*sprd_eic), GFP_KERNEL);
> +	sprd_eic = devm_kzalloc(dev, sizeof(*sprd_eic), GFP_KERNEL);
>   	if (!sprd_eic)
>   		return -ENOMEM;
>   
> @@ -624,7 +625,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
>   		if (!res)
>   			break;
>   
> -		sprd_eic->base[i] = devm_ioremap_resource(&pdev->dev, res);
> +		sprd_eic->base[i] = devm_ioremap_resource(dev, res);
>   		if (IS_ERR(sprd_eic->base[i]))
>   			return PTR_ERR(sprd_eic->base[i]);
>   	}
> @@ -632,7 +633,7 @@ static int sprd_eic_probe(struct platform_device *pdev)
>   	sprd_eic->chip.label = sprd_eic_label_name[sprd_eic->type];
>   	sprd_eic->chip.ngpio = pdata->num_eics;
>   	sprd_eic->chip.base = -1;
> -	sprd_eic->chip.parent = &pdev->dev;
> +	sprd_eic->chip.parent = dev;
>   	sprd_eic->chip.direction_input = sprd_eic_direction_input;
>   	switch (sprd_eic->type) {
>   	case SPRD_EIC_DEBOUNCE:
> @@ -659,9 +660,9 @@ static int sprd_eic_probe(struct platform_device *pdev)
>   	irq->num_parents = 1;
>   	irq->parents = &sprd_eic->irq;
>   
> -	ret = devm_gpiochip_add_data(&pdev->dev, &sprd_eic->chip, sprd_eic);
> +	ret = devm_gpiochip_add_data(dev, &sprd_eic->chip, sprd_eic);
>   	if (ret < 0) {
> -		dev_err(&pdev->dev, "Could not register gpiochip %d.\n", ret);
> +		dev_err(dev, "Could not register gpiochip %d.\n", ret);
>   		return ret;
>   	}
>   
> @@ -669,11 +670,10 @@ static int sprd_eic_probe(struct platform_device *pdev)
>   	ret = atomic_notifier_chain_register(&sprd_eic_irq_notifier,
>   					     &sprd_eic->irq_nb);
>   	if (ret)
> -		return dev_err_probe(&pdev->dev, ret,
> +		return dev_err_probe(dev, ret,
>   				     "Failed to register with the interrupt notifier");
>   
> -	return devm_add_action_or_reset(&pdev->dev,
> -					sprd_eic_unregister_notifier,
> +	return devm_add_action_or_reset(dev, sprd_eic_unregister_notifier,
>   					&sprd_eic->irq_nb);
>   }
>