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

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@davemloft.net>:

On Wed, 20 Apr 2022 19:04:08 +0800 you wrote:
> 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>
> 
> [...]

Here is the summary with links:
  - net: dsa: Add missing of_node_put() in dsa_port_link_register_of
    https://git.kernel.org/netdev/net/c/fc06b2867f4c

You are awesome, thank you!
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