diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 216eb38a847d..b0150f79dcdd 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -412,21 +412,19 @@ static unsigned int dsa_fastest_ageing_time(struct dsa_switch *ds,
 	for (i = 0; i < ds->num_ports; ++i) {
 		struct dsa_port *dp = &ds->ports[i];
 
-		if (dp && dp->ageing_time && dp->ageing_time < ageing_time)
+		if (dp->ageing_time && dp->ageing_time < ageing_time)
 			ageing_time = dp->ageing_time;
 	}
 
 	return ageing_time;
 }
 
-static int dsa_slave_ageing_time(struct net_device *dev,
-				 const struct switchdev_attr *attr,
-				 struct switchdev_trans *trans)
+static int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
+				struct switchdev_trans *trans)
 {
-	struct dsa_slave_priv *p = netdev_priv(dev);
-	struct dsa_switch *ds = p->dp->ds;
-	unsigned long ageing_jiffies = clock_t_to_jiffies(attr->u.ageing_time);
+	unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
 	unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
+	struct dsa_switch *ds = dp->ds;
 
 	if (switchdev_trans_ph_prepare(trans)) {
 		if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
@@ -437,7 +435,7 @@ static int dsa_slave_ageing_time(struct net_device *dev,
 	}
 
 	/* Keep the fastest ageing time in case of multiple bridges */
-	p->dp->ageing_time = ageing_time;
+	dp->ageing_time = ageing_time;
 	ageing_time = dsa_fastest_ageing_time(ds, ageing_time);
 
 	if (ds->ops->set_ageing_time)
@@ -463,7 +461,7 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
 					      trans);
 		break;
 	case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
-		ret = dsa_slave_ageing_time(dev, attr, trans);
+		ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
 		break;
 	default:
 		ret = -EOPNOTSUPP;