openwrt/target/linux/generic/backport-6.6/822-v6.11-0002-nvmem-meson-efuse-Replacing-the-use-of-of_node_put-t.patch

From 5fecb932607d83d37a703c731268e9d9051457f5 Mon Sep 17 00:00:00 2001
From: MarileneGarcia <marilene.agarcia@gmail.com>
Date: Fri, 5 Jul 2024 08:48:40 +0100
Subject: [PATCH] nvmem: meson-efuse: Replacing the use of of_node_put to
 __free

Use __free for device_node values, and thus drop calls to
of_node_put.

The goal is to reduce memory management issues by using this
scope-based of_node_put() cleanup to simplify function exit
handling. When using __free a resource is allocated within a
block, it is automatically freed at the end of the block.

Suggested-by: Julia Lawall <julia.lawall@inria.fr>
Signed-off-by: MarileneGarcia <marilene.agarcia@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240705074852.423202-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/nvmem/meson-efuse.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/nvmem/meson-efuse.c
+++ b/drivers/nvmem/meson-efuse.c
@@ -48,20 +48,19 @@ static int meson_efuse_probe(struct plat
 {
 	struct device *dev = &pdev->dev;
 	struct meson_sm_firmware *fw;
-	struct device_node *sm_np;
 	struct nvmem_device *nvmem;
 	struct nvmem_config *econfig;
 	struct clk *clk;
 	unsigned int size;
+	struct device_node *sm_np __free(device_node) =
+			of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0);
 
-	sm_np = of_parse_phandle(pdev->dev.of_node, "secure-monitor", 0);
 	if (!sm_np) {
 		dev_err(&pdev->dev, "no secure-monitor node\n");
 		return -ENODEV;
 	}
 
 	fw = meson_sm_get(sm_np);
-	of_node_put(sm_np);
 	if (!fw)
 		return -EPROBE_DEFER;