+/* update phy/port status information for firmware */
+static void icssm_emac_update_phystatus(struct prueth_emac *emac)
+{
+	struct prueth *prueth = emac->prueth;
+	u32 phy_speed, port_status = 0;
+	enum prueth_mem region;
+	u32 delay;
+
+	region = emac->dram;
+	phy_speed = emac->speed;
+	icssm_prueth_write_reg(prueth, region, PHY_SPEED_OFFSET, phy_speed);
+
+	if (phy_speed == SPEED_10)
+		delay = TX_CLK_DELAY_10M;

How can speed to 10? You removed those link modes?

+/**
+ * icssm_emac_ndo_start_xmit - EMAC Transmit function
+ * @skb: SKB pointer
+ * @ndev: EMAC network adapter
+ *
+ * Called by the system to transmit a packet  - we queue the packet in
+ * EMAC hardware transmit queue
+ *
+ * Return: success(NETDEV_TX_OK) or error code (typically out of desc's)
+ */
+static int icssm_emac_ndo_start_xmit(struct sk_buff *skb,
+				     struct net_device *ndev)
+{
+	struct prueth_emac *emac = netdev_priv(ndev);
+	int ret = 0;
+	u16 qid;
+
+	if (unlikely(!emac->link)) {
+		if (netif_msg_tx_err(emac) && net_ratelimit())
+			netdev_err(ndev, "No link to transmit");
+		goto fail_tx;
+	}

Do many other MAC drivers have this test?

This looks familiar....

	Andrew