linux-kernel - [PATCH v2] hwmon: (gsc-hwmon) Add missing of_node

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Message-Id: <20220616114024.3985770-1-windhl@126.com>
Date:   Thu, 16 Jun 2022 19:40:24 +0800
From:   Liang He <windhl@....com>
To:     tharvey@...eworks.com, rjones@...eworks.com, jdelvare@...e.com,
        linux@...ck-us.net
Cc:     windhl@....com, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] hwmon: (gsc-hwmon) Add missing of_node_put()

In gsc_hwmon_get_devtree_pdata(), of_find_compatible_node() will return
a node pointer with refcount incremented. We should use of_node_put() in
fail path or when it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 drivers/hwmon/gsc-hwmon.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
index 1fe37418ff46..d64be48f1ef6 100644
--- a/drivers/hwmon/gsc-hwmon.c
+++ b/drivers/hwmon/gsc-hwmon.c
@@ -269,10 +269,13 @@ gsc_hwmon_get_devtree_pdata(struct device *dev)
 	/* fan controller base address */
 	fan = of_find_compatible_node(dev->parent->of_node, NULL, "gw,gsc-fan");
 	if (fan && of_property_read_u32(fan, "reg", &pdata->fan_base)) {
+		of_node_put(fan);
 		dev_err(dev, "fan node without base\n");
 		return ERR_PTR(-EINVAL);
 	}
 
+	of_node_put(fan);
+
 	/* allocate structures for channels and count instances of each type */
 	device_for_each_child_node(dev, child) {
 		if (fwnode_property_read_string(child, "label", &ch->name)) {
-- 
2.25.1