diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 4c11619a818b..75f5d1f8554b 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -586,8 +586,8 @@ static struct device_node *dsa_get_ports(struct dsa_switch *ds,
 static int _dsa_register_switch(struct dsa_switch *ds, struct device *dev)
 {
 	struct device_node *np = dev->of_node;
-	struct device_node *ports = dsa_get_ports(ds, np);
 	struct dsa_switch_tree *dst;
+	struct device_node *ports;
 	u32 tree, index;
 	int i, err;
 
@@ -595,6 +595,7 @@ static int _dsa_register_switch(struct dsa_switch *ds, struct device *dev)
 	if (err)
 		return err;
 
+	ports = dsa_get_ports(ds, np);
 	if (IS_ERR(ports))
 		return PTR_ERR(ports);