linux-kernel - Re: [PATCH 1/2] device property: introduce fwnode_for_each_available_child_node

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Date: Wed, 22 May 2024 11:45:48 +0000
From: Sakari Ailus <sakari.ailus@...ux.intel.com>
To: Javier Carrasco <javier.carrasco.cruz@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Daniel Scally <djrscally@...il.com>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Antoniu Miclaus <antoniu.miclaus@...log.com>,
	Jonathan Cameron <jic23@...nel.org>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH 1/2] device property: introduce
 fwnode_for_each_available_child_node_scoped()

Hi Javier,

On Wed, May 22, 2024 at 11:18:07AM +0200, Javier Carrasco wrote:
> Add a scoped version of fwnode_for_each_available_child_node() following
> the approach recently taken for other loops that handle child nodes like
> for_each_child_of_node_scoped() or device_for_each_child_node_scoped(),
> which are based on the __free() auto cleanup handler to remove the need
> for fwnode_handle_put() on early loop exits.
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
> ---
>  include/linux/property.h | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/property.h b/include/linux/property.h
> index 61fc20e5f81f..bcc3dda5a9d8 100644
> --- a/include/linux/property.h
> +++ b/include/linux/property.h
> @@ -168,6 +168,11 @@ struct fwnode_handle *fwnode_get_next_available_child_node(
>  	for (child = fwnode_get_next_available_child_node(fwnode, NULL); child;\
>  	     child = fwnode_get_next_available_child_node(fwnode, child))
>  
> +#define fwnode_for_each_available_child_node_scoped(fwnode, child)	\
> +	for (struct fwnode_handle *child __free(fwnode_handle) =	\
> +		fwnode_get_next_available_child_node(fwnode, NULL);	\
> +	     child; child = fwnode_get_next_available_child_node(fwnode, child))
> +
>  struct fwnode_handle *device_get_next_child_node(const struct device *dev,
>  						 struct fwnode_handle *child);
>  

Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>

-- 
Sakari Ailus