diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 35715fd..d6e7a64 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -355,11 +355,12 @@ static int dsa_slave_port_attr_get(struct net_device *dev,
 {
 	struct dsa_port *dp = dsa_slave_to_port(dev);
 	struct dsa_switch *ds = dp->ds;
+	struct dsa_switch_tree *dst = ds->dst;
 
 	switch (attr->id) {
 	case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
-		attr->u.ppid.id_len = sizeof(ds->index);
-		memcpy(&attr->u.ppid.id, &ds->index, attr->u.ppid.id_len);
+		attr->u.ppid.id_len = sizeof(dst->index);
+		memcpy(&attr->u.ppid.id, &dst->index, attr->u.ppid.id_len);
 		break;
 	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT:
 		attr->u.brport_flags_support = 0;