net: ethernet: dwc_eth_qos: fix fixed-link phydev leaks

Make sure to deregister and free any fixed-link PHY registered using
of_phy_register_fixed_link() on probe errors and on driver unbind.

Fixes: 077742dac2c7 ("dwc_eth_qos: Add support for Synopsys DWC Ethernet
QoS")
Signed-off-by: Johan Hovold <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/ethernet/synopsys/dwc_eth_qos.c

···
 	ret = of_get_phy_mode(lp->pdev->dev.of_node);
 	if (ret < 0) {
 		dev_err(&lp->pdev->dev, "error in getting phy i/f\n");
-		goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 
 	lp->phy_interface = ret;
···
 	ret = dwceqos_mii_init(lp);
 	if (ret) {
 		dev_err(&lp->pdev->dev, "error in dwceqos_mii_init\n");
-		goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 
 	ret = dwceqos_mii_probe(ndev);
 	if (ret != 0) {
 		netdev_err(ndev, "mii_probe fail.\n");
 		ret = -ENXIO;
-		goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 
 	dwceqos_set_umac_addr(lp, lp->ndev->dev_addr, 0);
···
 	if (ret) {
 		dev_err(&lp->pdev->dev, "Unable to retrieve DT, error %d\n",
 			ret);
-		goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 	dev_info(&lp->pdev->dev, "pdev->id %d, baseaddr 0x%08lx, irq %d\n",
 		 pdev->id, ndev->base_addr, ndev->irq);
···
 	if (ret) {
 		dev_err(&lp->pdev->dev, "Unable to request IRQ %d, error %d\n",
 			ndev->irq, ret);
-		goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 
 	if (netif_msg_probe(lp))
···
 	ret = register_netdev(ndev);
 	if (ret) {
 		dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
-			goto err_out_clk_dis_phy;
+		goto err_out_deregister_fixed_link;
 	}
 
 	return 0;
 
+err_out_deregister_fixed_link:
+	if (of_phy_is_fixed_link(pdev->dev.of_node))
+		of_phy_deregister_fixed_link(pdev->dev.of_node);
 err_out_clk_dis_phy:
 	clk_disable_unprepare(lp->phy_ref_clk);
 err_out_clk_dis_aper:
···
 	if (ndev) {
 		lp = netdev_priv(ndev);
 
-		if (ndev->phydev)
+		if (ndev->phydev) {
 			phy_disconnect(ndev->phydev);
+			if (of_phy_is_fixed_link(pdev->dev.of_node))
+				of_phy_deregister_fixed_link(pdev->dev.of_node);
+		}
 		mdiobus_unregister(lp->mii_bus);
 		mdiobus_free(lp->mii_bus);