linux-kernel - [PATCH 2/3] sparc: Fix reference leak in scan_of

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Date:   Tue,  7 Jun 2022 07:32:58 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Miaoqian Lin <linmq006@...il.com>, sparclinux@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] sparc: Fix reference leak in scan_of_devices

of_find_node_by_path() returns a node pointer with
refcount incremented, we should use of_node_put() on it when not need
anymore.
Add missing of_node_put() to avoid refcount leak.

Fixes: cf44bbc26cf1 ("[SPARC]: Beginnings of generic of_device framework.")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 arch/sparc/kernel/of_device_32.c | 4 +++-
 arch/sparc/kernel/of_device_64.c | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/sparc/kernel/of_device_32.c b/arch/sparc/kernel/of_device_32.c
index 4ebf51e6e78e..020b1c023d75 100644
--- a/arch/sparc/kernel/of_device_32.c
+++ b/arch/sparc/kernel/of_device_32.c
@@ -412,8 +412,10 @@ static int __init scan_of_devices(void)
 	struct platform_device *parent;
 
 	parent = scan_one_device(root, NULL);
-	if (!parent)
+	if (!parent) {
+		of_node_put(root);
 		return 0;
+	}
 
 	scan_tree(root->child, &parent->dev);
 	return 0;
diff --git a/arch/sparc/kernel/of_device_64.c b/arch/sparc/kernel/of_device_64.c
index 5a9f86b1d4e7..f044b4c1975b 100644
--- a/arch/sparc/kernel/of_device_64.c
+++ b/arch/sparc/kernel/of_device_64.c
@@ -705,8 +705,10 @@ static int __init scan_of_devices(void)
 	struct platform_device *parent;
 
 	parent = scan_one_device(root, NULL);
-	if (!parent)
+	if (!parent) {
+		of_node_put(root);
 		return 0;
+	}
 
 	scan_tree(root->child, &parent->dev);
 	return 0;
-- 
2.25.1