From: Peter Griffin <peter.griffin@xxxxxxxxxx>
[ Upstream commit e28c28a34ee9fa2ea671a20e5e7064e6220d55e7 ]
of_parse_phandle() returns a device_node with refcount incremented, which
the callee needs to call of_node_put() on when done. We should only call
of_node_put() when the property argument is provided though as otherwise
nothing has taken a reference on the node.
Fixes: f36e789a1f8d ("mfd: altera-sysmgr: Add SOCFPGA System Manager")
Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240220115012.471689-4-peter.griffin@xxxxxxxxxx
Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/mfd/altera-sysmgr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mfd/altera-sysmgr.c b/drivers/mfd/altera-sysmgr.c
index 0e52bd2ebd74b..fb5f988e61f37 100644
--- a/drivers/mfd/altera-sysmgr.c
+++ b/drivers/mfd/altera-sysmgr.c
@@ -109,7 +109,9 @@ struct regmap *altr_sysmgr_regmap_lookup_by_phandle(struct device_node *np,
dev = driver_find_device_by_of_node(&altr_sysmgr_driver.driver,
(void *)sysmgr_np);
- of_node_put(sysmgr_np);
+ if (property)
+ of_node_put(sysmgr_np);
+
if (!dev)
return ERR_PTR(-EPROBE_DEFER);
--
2.43.0
