[PATCH v1] bus: arm-cci: Drop cci-control-port node reference in __cci_ace_get_port()

[PATCH v1] bus: arm-cci: Drop cci-control-port node reference in __cci_ace_get_port()

[Yuho Choi]

__cci_ace_get_port() looks up the device's "cci-control-port" node with
of_parse_phandle(), which returns the node with its reference count
raised, and only compares the pointer against the probed ports.  Neither
the match nor the no-match return releases it.

Drop the reference on both paths once the comparison is done.

Fixes: ed69bdd8fd9b ("drivers: bus: add ARM CCI support")
Signed-off-by: Yuho Choi <oss.patchbox@gmail.com>
---
Found by code review; compile-tested only (multi_v7_defconfig, W=1).

 drivers/bus/arm-cci.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
index 7f2baf0571286..223b1fe19ba06 100644
--- a/drivers/bus/arm-cci.c
+++ b/drivers/bus/arm-cci.c
@@ -167,9 +167,12 @@ static int __cci_ace_get_port(struct device_node *dn, int type)
 	cci_portn = of_parse_phandle(dn, "cci-control-port", 0);
 	for (i = 0; i < nb_cci_ports; i++) {
 		ace_match = ports[i].type == type;
-		if (ace_match && cci_portn == ports[i].dn)
+		if (ace_match && cci_portn == ports[i].dn) {
+			of_node_put(cci_portn);
 			return i;
+		}
 	}
+	of_node_put(cci_portn);
 	return -ENODEV;
 }
 

base-commit: f0100363d8c374bd8e9ea7c9ba02744f0b802ca4
-- 
2.43.0