linux-kernel - Re: [PATCH v4 1/2] device property: Add scoped fwnode child node iterators

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Message-ID: <a25b2c4e-9003-40be-b02e-45e8237c3261@kernel.org>
Date: Tue, 2 Sep 2025 21:11:19 +0200
From: Danilo Krummrich <dakr@...nel.org>
To: Jean-François Lessard <jefflessard3@...il.com>
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Daniel Scally <djrscally@...il.com>,
 Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
 Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 "Rafael J. Wysocki" <rafael@...nel.org>, linux-i2c@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v4 1/2] device property: Add scoped fwnode child node
 iterators

On 9/2/25 9:04 PM, Jean-François Lessard wrote:
> Add scoped versions of fwnode child node iterators that automatically
> handle reference counting cleanup using the __free() attribute:
> 
> - fwnode_for_each_child_node_scoped()
> - fwnode_for_each_available_child_node_scoped()
> 
> These macros follow the same pattern as existing scoped iterators in the
> kernel, ensuring fwnode references are automatically released when the
> iterator variable goes out of scope. This prevents resource leaks and
> eliminates the need for manual cleanup in error paths.
> 
> The implementation mirrors the non-scoped variants but uses
> __free(fwnode_handle) for automatic resource management, providing a
> safer and more convenient interface for drivers iterating over firmware
> node children.
> 
> Signed-off-by: Jean-François Lessard <jefflessard3@...il.com>

Acked-by: Danilo Krummrich <dakr@...nel.org>