linux-kernel - Re: [PATCH 1/3] gpio: dwapb: switch to device_for_each_child_node

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Message-ID: <kyjzvihhpsxkkuerkyg6ja6dcod7njgzmd6emz7rqd4c4lbn32@e7y4er3ngk3l>
Date: Mon, 30 Sep 2024 16:06:35 +0300
From: Serge Semin <fancer.lancer@...il.com>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: Hoan Tran <hoan@...amperecomputing.com>, 
	Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>, 
	Mika Westerberg <mika.westerberg@...ux.intel.com>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, 
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH 1/3] gpio: dwapb: switch to
 device_for_each_child_node_scoped()

On Sat, Sep 28, 2024 at 09:47:35PM GMT, Javier Carrasco wrote:
> Switch to device_for_each_child_node_scoped() to simplify the code by
> removing the need for a  call to fwnode_handle_put() in the error path.
> 
> This also prevents possible memory leaks if new error paths are added
> without the required call to fwnode_handle_put().
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>

Acked-by: Serge Semin <fancer.lancer@...il.com>

-Serge(y)

> ---
>  drivers/gpio/gpio-dwapb.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> index 798235791f70..bd374fc27174 100644
> --- a/drivers/gpio/gpio-dwapb.c
> +++ b/drivers/gpio/gpio-dwapb.c
> @@ -571,7 +571,6 @@ static void dwapb_get_irq(struct device *dev, struct fwnode_handle *fwnode,
>  
>  static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
>  {
> -	struct fwnode_handle *fwnode;
>  	struct dwapb_platform_data *pdata;
>  	struct dwapb_port_property *pp;
>  	int nports;
> @@ -592,7 +591,7 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
>  	pdata->nports = nports;
>  
>  	i = 0;
> -	device_for_each_child_node(dev, fwnode)  {
> +	device_for_each_child_node_scoped(dev, fwnode)  {
>  		pp = &pdata->properties[i++];
>  		pp->fwnode = fwnode;
>  
> @@ -600,7 +599,6 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
>  		    pp->idx >= DWAPB_MAX_PORTS) {
>  			dev_err(dev,
>  				"missing/invalid port index for port%d\n", i);
> -			fwnode_handle_put(fwnode);
>  			return ERR_PTR(-EINVAL);
>  		}
>  
> 
> -- 
> 2.43.0
>