openwrt/target/linux/generic/backport-5.15/728-v6.1-03-net-ethernet-mtk_eth_wed-add-missing-of_node_put.patch

From e0bb4659e235770e6f53b3692e958591f49448f5 Mon Sep 17 00:00:00 2001
From: Yang Yingliang <[email protected]>
Date: Mon, 17 Oct 2022 11:51:56 +0800
Subject: [PATCH 3/3] net: ethernet: mtk_eth_wed: add missing of_node_put()

The device_node pointer returned by of_parse_phandle() with refcount
incremented, when finish using it, the refcount need be decreased.

Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Yang Yingliang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
---
 drivers/net/ethernet/mediatek/mtk_wed.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -1079,7 +1079,7 @@ void mtk_wed_add_hw(struct device_node *
 
 	pdev = of_find_device_by_node(np);
 	if (!pdev)
-		return;
+		goto err_of_node_put;
 
 	get_device(&pdev->dev);
 	irq = platform_get_irq(pdev, 0);
@@ -1139,6 +1139,8 @@ unlock:
 	mutex_unlock(&hw_lock);
 err_put_device:
 	put_device(&pdev->dev);
+err_of_node_put:
+	of_node_put(np);
 }
 
 void mtk_wed_exit(void)
@@ -1159,6 +1161,7 @@ void mtk_wed_exit(void)
 		hw_list[i] = NULL;
 		debugfs_remove(hw->debugfs_dir);
 		put_device(hw->dev);
+		of_node_put(hw->node);
 		kfree(hw);
 	}
 }