[PATCH 5.15.y] regulator: scmi: fix of_node refcount leak in scmi_regulator_probe()

[Sasha Levin <sashal@kernel.org>]

From: Wentao Liang <vulab@iscas.ac.cn>

[ Upstream commit fa11039d6cdff84584a3ef8cc1f5e1b56e045da2 ]

scmi_regulator_probe() calls of_find_node_by_name() which takes a
reference on the returned device node. On the error path where
process_scmi_regulator_of_node() fails, the function returns without
calling of_node_put() on the child node, leaking the reference.

Add of_node_put(np) on the error path to properly release the
reference.

Cc: stable@vger.kernel.org
Fixes: 0fbeae70ee7c ("regulator: add SCMI driver")
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
Link: https://patch.msgid.link/20260527104850.872415-1-vulab@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
[ kept the existing of_node_put(child) since 5.15 still uses the non-scoped for_each_child_of_node() loop, only adding the new of_node_put(np) line ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/regulator/scmi-regulator.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/regulator/scmi-regulator.c b/drivers/regulator/scmi-regulator.c
index 7c0d29c7856bb6..3fdc5130523e3b 100644
--- a/drivers/regulator/scmi-regulator.c
+++ b/drivers/regulator/scmi-regulator.c
@@ -350,6 +350,7 @@ static int scmi_regulator_probe(struct scmi_device *sdev)
 		/* abort on any mem issue */
 		if (ret == -ENOMEM) {
 			of_node_put(child);
+			of_node_put(np);
 			return ret;
 		}
 	}
-- 
2.53.0