regulator: core: fix unbalanced of node refcount in regulator_dev_lookup()

[ Upstream commit f2b41b748c19962b82709d9f23c6b2b0ce9d2f91 ]

I got the the following report:

  OF: ERROR: memory leak, expected refcount 1 instead of 2,
  of_node_get()/of_node_put() unbalanced - destroy cset entry:
  attach overlay node /i2c/pmic@62/regulators/exten

In of_get_regulator(), the node is returned from of_parse_phandle()
with refcount incremented, after using it, of_node_put() need be called.

Fixes: 69511a452e6d ("regulator: map consumer regulator based on device tree")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20221115091508.900752-1-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e8c00a8..bc4bba8 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1943,6 +1943,7 @@ static struct regulator_dev *regulator_dev_lookup(struct device *dev,
                node = of_get_regulator(dev, supply);
                if (node) {
                        r = of_find_regulator_by_node(node);
+                       of_node_put(node);
                        if (r)
                                return r;