[PATCH 5.15 035/530] hwmon: (gsc-hwmon) Call of_node_get() before of_find_xxx API

[Greg Kroah-Hartman]

From: Liang He <windhl@xxxxxxx>

commit 7f62cf781e6567d59c8935dc8c6068ce2bb904b7 upstream.

In gsc_hwmon_get_devtree_pdata(), we should call of_node_get() before
the of_find_compatible_node() which will automatically call
of_node_put() for the 'from' argument.

Fixes: 3bce5377ef66 ("hwmon: Add Gateworks System Controller support")
Signed-off-by: Liang He <windhl@xxxxxxx>
Co-developed-by: Mengda Chen <chenmengda2009@xxxxxxx>
Signed-off-by: Mengda Chen <chenmengda2009@xxxxxxx>
Link: https://lore.kernel.org/r/20220916154708.3084515-1-chenmengda2009@xxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/hwmon/gsc-hwmon.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/hwmon/gsc-hwmon.c
+++ b/drivers/hwmon/gsc-hwmon.c
@@ -267,6 +267,7 @@ gsc_hwmon_get_devtree_pdata(struct devic
 	pdata->nchannels = nchannels;
 
 	/* fan controller base address */
+	of_node_get(dev->parent->of_node);
 	fan = of_find_compatible_node(dev->parent->of_node, NULL, "gw,gsc-fan");
 	if (fan && of_property_read_u32(fan, "reg", &pdata->fan_base)) {
 		dev_err(dev, "fan node without base\n");