linux-kernel - [PATCH net-next 1/3] device property: Introduce fwnode_for_each_available_child_node

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Message-Id: <20241008-mv88e6xxx_leds_fwnode_put-v1-1-cfd7758cd176@gmail.com>
Date: Tue, 08 Oct 2024 18:10:27 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: 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>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, Andrew Lunn <andrew@...n.ch>, 
 Florian Fainelli <f.fainelli@...il.com>, 
 Vladimir Oltean <olteanv@...il.com>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Linus Walleij <linus.walleij@...aro.org>
Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 netdev@...r.kernel.org, Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH net-next 1/3] device property: Introduce
 fwnode_for_each_available_child_node_scoped()

Introduce the scoped variant of the
fwnode_for_each_available_child_node() to automatically decrement the
child's refcount when it goes out of scope, removing the need for
explicit calls to fwnode_handle_put().

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..b37508ecf606 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);

-- 
2.43.0