diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 9ecbe78..fd78d4c 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -69,6 +69,12 @@
 	return !!p->bridge_dev;
 }
 
+static void dsa_port_set_stp_state(struct dsa_switch *ds, int port, u8 state)
+{
+	if (ds->ops->port_stp_state_set)
+		ds->ops->port_stp_state_set(ds, port, state);
+}
+
 static int dsa_slave_open(struct net_device *dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(dev);
@@ -104,8 +110,7 @@
 			goto clear_promisc;
 	}
 
-	if (ds->ops->port_stp_state_set)
-		ds->ops->port_stp_state_set(ds, p->port, stp_state);
+	dsa_port_set_stp_state(ds, p->port, stp_state);
 
 	if (p->phy)
 		phy_start(p->phy);
@@ -147,8 +152,7 @@
 	if (ds->ops->port_disable)
 		ds->ops->port_disable(ds, p->port, p->phy);
 
-	if (ds->ops->port_stp_state_set)
-		ds->ops->port_stp_state_set(ds, p->port, BR_STATE_DISABLED);
+	dsa_port_set_stp_state(ds, p->port, BR_STATE_DISABLED);
 
 	return 0;
 }
@@ -354,7 +358,7 @@
 	if (switchdev_trans_ph_prepare(trans))
 		return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
 
-	ds->ops->port_stp_state_set(ds, p->port, attr->u.stp_state);
+	dsa_port_set_stp_state(ds, p->port, attr->u.stp_state);
 
 	return 0;
 }
@@ -556,8 +560,7 @@
 	/* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
 	 * so allow it to be in BR_STATE_FORWARDING to be kept functional
 	 */
-	if (ds->ops->port_stp_state_set)
-		ds->ops->port_stp_state_set(ds, p->port, BR_STATE_FORWARDING);
+	dsa_port_set_stp_state(ds, p->port, BR_STATE_FORWARDING);
 }
 
 static int dsa_slave_port_attr_get(struct net_device *dev,