[PATCH 5.4 109/255] memory: of: Fix refcount leak bug in of_get_ddr_timings()

From: Greg Kroah-Hartman
Date: Mon Oct 24 2022 - 12:42:18 EST


From: Liang He <windhl@xxxxxxx>

[ Upstream commit 05215fb32010d4afb68fbdbb4d237df6e2d4567b ]

We should add the of_node_put() when breaking out of
for_each_child_of_node() as it will automatically increase
and decrease the refcount.

Fixes: e6b42eb6a66c ("memory: emif: add device tree support to emif driver")
Signed-off-by: Liang He <windhl@xxxxxxx>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220719085640.1210583-1-windhl@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/memory/of_memory.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/memory/of_memory.c b/drivers/memory/of_memory.c
index 46539b27a3fb..835754304a7f 100644
--- a/drivers/memory/of_memory.c
+++ b/drivers/memory/of_memory.c
@@ -132,6 +132,7 @@ const struct lpddr2_timings *of_get_ddr_timings(struct device_node *np_ddr,
for_each_child_of_node(np_ddr, np_tim) {
if (of_device_is_compatible(np_tim, tim_compat)) {
if (of_do_get_timings(np_tim, &timings[i])) {
+ of_node_put(np_tim);
devm_kfree(dev, timings);
goto default_timings;
}
--
2.35.1