linux-kernel - [RFC PATCH 3/5] of: unittest: Use for_each_child_of_node

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Date: Sun, 28 Jan 2024 16:05:40 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: linux-iio@...r.kernel.org,
	Rob Herring <robh@...nel.org>,
	Frank Rowand <frowand.list@...il.com>,
	linux-kernel@...r.kernel.org
Cc: Julia Lawall <Julia.Lawall@...ia.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Sumera Priyadarsini <sylphrenadin@...il.com>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	linux-acpi@...r.kernel.org,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nuno Sá <nuno.sa@...log.com>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [RFC PATCH 3/5] of: unittest: Use for_each_child_of_node_scoped()

From: Jonathan Cameron <Jonathan.Cameron@...wei.com>

A simple example of the utility of this autocleanup approach to
handling of_node_put()

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
---
 drivers/of/unittest.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index cfd60e35a899..d353327767b3 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -233,27 +233,22 @@ static void __init of_unittest_dynamic(void)
 
 static int __init of_unittest_check_node_linkage(struct device_node *np)
 {
-	struct device_node *child;
 	int count = 0, rc;
 
-	for_each_child_of_node(np, child) {
+	for_each_child_of_node_scoped(np, child) {
 		if (child->parent != np) {
 			pr_err("Child node %pOFn links to wrong parent %pOFn\n",
 				 child, np);
-			rc = -EINVAL;
-			goto put_child;
+			return -EINVAL;
 		}
 
 		rc = of_unittest_check_node_linkage(child);
 		if (rc < 0)
-			goto put_child;
+			return rc;
 		count += rc;
 	}
 
 	return count + 1;
-put_child:
-	of_node_put(child);
-	return rc;
 }
 
 static void __init of_unittest_check_tree_linkage(void)
-- 
2.43.0