[PATCH] net: dsa: Add missing of_node_put() in dsa_port_link_register_of

From: Miaoqian Lin <linmq006@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Russell King <linux@armlinux.org.uk>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: linmq006@gmail.com
Subject: [PATCH] net: dsa: Add missing of_node_put() in dsa_port_link_register_of
Date: Wed, 20 Apr 2022 19:04:08 +0800	[thread overview]
Message-ID: <20220420110413.17828-1-linmq006@gmail.com> (raw)

The device_node pointer is returned by of_parse_phandle()  with refcount
incremented. We should use of_node_put() on it when done.
of_node_put() will check for NULL value.

Fixes: a20f997010c4 ("net: dsa: Don't instantiate phylink for CPU/DSA ports unless needed")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 net/dsa/port.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/dsa/port.c b/net/dsa/port.c
index 32d472a82241..cdc56ba11f52 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1620,8 +1620,10 @@ int dsa_port_link_register_of(struct dsa_port *dp)
 			if (ds->ops->phylink_mac_link_down)
 				ds->ops->phylink_mac_link_down(ds, port,
 					MLO_AN_FIXED, PHY_INTERFACE_MODE_NA);
+			of_node_put(phy_np);
 			return dsa_port_phylink_register(dp);
 		}
+		of_node_put(phy_np);
 		return 0;
 	}
 
-- 
2.17.1

