diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 872ec1e492c4..9e72fe465e50 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -2007,18 +2007,10 @@ static int airoha_dev_init(struct net_device *netdev)
 
 	switch (port->id) {
 	case AIROHA_GDM3_IDX:
-	case AIROHA_GDM4_IDX: {
-		struct airoha_eth *eth = dev->eth;
-
-		/* GDM2 supports a single net_device */
-		if (eth->ports[1] && eth->ports[1]->devs[0])
+	case AIROHA_GDM4_IDX:
+		if (airoha_get_wan_gdm_dev(dev->eth))
 			break;
-
-		if (airoha_get_wan_gdm_dev(eth))
-			break;
-
 		fallthrough;
-	}
 	case AIROHA_GDM2_IDX:
 		/* GDM2 is always used as wan */
 		dev->flags |= AIROHA_PRIV_F_WAN;