hwmon: (ltc2992) Put fwnode in error case during ->probe()

[ Upstream commit 8370e5b093080c03cf89f7ebf0bef6984545429e ]

In each iteration fwnode_for_each_available_child_node() bumps a reference
counting of a loop variable followed by dropping in on a next iteration,

Since in error case the loop is broken, we have to drop a reference count
by ourselves. Do it for port_fwnode in error case during ->probe().

Fixes: b0bd407e94b0 ("hwmon: (ltc2992) Add support")
Cc: Alexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210510100136.3303142-1-andy.shevchenko@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c
index 4382105bf14205d5658401464b839b3fa40c0952..2a4bed0ab226bdfd76d80b8ebe1a43bfb8a5e71d 100644 (file)
--- a/drivers/hwmon/ltc2992.c
+++ b/drivers/hwmon/ltc2992.c
@@ -900,11 +900,15 @@ static int ltc2992_parse_dt(struct ltc2992_state *st)
 
        fwnode_for_each_available_child_node(fwnode, child) {
                ret = fwnode_property_read_u32(child, "reg", &addr);
-               if (ret < 0)
+               if (ret < 0) {
+                       fwnode_handle_put(child);
                        return ret;
+               }
 
-               if (addr > 1)
+               if (addr > 1) {
+                       fwnode_handle_put(child);
                        return -EINVAL;
+               }
 
                ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val);
                if (!ret)