Merge branch 'fixed-phy-phydev-leaks'

Johan Hovold says:

====================
net: fix fixed-link phydev leaks

This series fixes failures to deregister and free fixed-link phydevs
that have been registered using the of_phy_register_fixed_link()
interface.

All but two drivers currently fail to do this and this series fixes most
of them with the exception of a staging driver and the stmmac drivers
which will be fixed by follow-on patches.

Included are also a couple of fixes for related of-node leaks.

Note that all patches except the of_mdio one have been compile-tested
only.

Also note that the series is against net due to dependencies not yet in
net-next.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/altera/altera_tse_main.c

@@ -819,6 +819,8 @@ static int init_phy(struct net_device *dev)
 
 	if (!phydev) {
 		netdev_err(dev, "Could not find the PHY\n");
+		if (fixed_link)
+			of_phy_deregister_fixed_link(priv->device->of_node);
 		return -ENODEV;
 	}
 
@@ -1545,10 +1547,15 @@ err_free_netdev:
 static int altera_tse_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct altera_tse_private *priv = netdev_priv(ndev);
 
-	if (ndev->phydev)
+	if (ndev->phydev) {
 		phy_disconnect(ndev->phydev);
 
+		if (of_phy_is_fixed_link(priv->device->of_node))
+			of_phy_deregister_fixed_link(priv->device->of_node);
+	}
+
 	platform_set_drvdata(pdev, NULL);
 	altera_tse_mdio_destroy(ndev);
 	unregister_netdev(ndev);

drivers/net/ethernet/aurora/nb8800.c

@@ -1466,12 +1466,12 @@ static int nb8800_probe(struct platform_device *pdev)
 
 	ret = nb8800_hw_init(dev);
 	if (ret)
-		goto err_free_bus;
+		goto err_deregister_fixed_link;
 
 	if (ops && ops->init) {
 		ret = ops->init(dev);
 		if (ret)
-			goto err_free_bus;
+			goto err_deregister_fixed_link;
 	}
 
 	dev->netdev_ops = &nb8800_netdev_ops;
@@ -1504,6 +1504,9 @@ static int nb8800_probe(struct platform_device *pdev)
 
 err_free_dma:
 	nb8800_dma_free(dev);
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(pdev->dev.of_node))
+		of_phy_deregister_fixed_link(pdev->dev.of_node);
 err_free_bus:
 	of_node_put(priv->phy_node);
 	mdiobus_unregister(bus);
@@ -1521,6 +1524,8 @@ static int nb8800_remove(struct platform_device *pdev)
 	struct nb8800_priv *priv = netdev_priv(ndev);
 
 	unregister_netdev(ndev);
+	if (of_phy_is_fixed_link(pdev->dev.of_node))
+		of_phy_deregister_fixed_link(pdev->dev.of_node);
 	of_node_put(priv->phy_node);
 
 	mdiobus_unregister(priv->mii_bus);

drivers/net/ethernet/broadcom/bcmsysport.c

@@ -1755,13 +1755,13 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 	if (priv->irq0 <= 0 || priv->irq1 <= 0) {
 		dev_err(&pdev->dev, "invalid interrupts\n");
 		ret = -EINVAL;
-		goto err;
+		goto err_free_netdev;
 	}
 
 	priv->base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(priv->base)) {
 		ret = PTR_ERR(priv->base);
-		goto err;
+		goto err_free_netdev;
 	}
 
 	priv->netdev = dev;
@@ -1779,7 +1779,7 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 		ret = of_phy_register_fixed_link(dn);
 		if (ret) {
 			dev_err(&pdev->dev, "failed to register fixed PHY\n");
-			goto err;
+			goto err_free_netdev;
 		}
 
 		priv->phy_dn = dn;
@@ -1821,7 +1821,7 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 	ret = register_netdev(dev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register net_device\n");
-		goto err;
+		goto err_deregister_fixed_link;
 	}
 
 	priv->rev = topctrl_readl(priv, REV_CNTL) & REV_MASK;
@@ -1832,7 +1832,11 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 		 priv->base, priv->irq0, priv->irq1, txq, rxq);
 
 	return 0;
-err:
+
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
+err_free_netdev:
 	free_netdev(dev);
 	return ret;
 }
@@ -1840,11 +1844,14 @@ err:
 static int bcm_sysport_remove(struct platform_device *pdev)
 {
 	struct net_device *dev = dev_get_drvdata(&pdev->dev);
+	struct device_node *dn = pdev->dev.of_node;
 
 	/* Not much to do, ndo_close has been called
 	 * and we use managed allocations
 	 */
 	unregister_netdev(dev);
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	free_netdev(dev);
 	dev_set_drvdata(&pdev->dev, NULL);
 

drivers/net/ethernet/broadcom/genet/bcmmii.c

@@ -627,6 +627,7 @@ static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv)
 int bcmgenet_mii_init(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	struct device_node *dn = priv->pdev->dev.of_node;
 	int ret;
 
 	ret = bcmgenet_mii_alloc(priv);
@@ -640,6 +641,8 @@ int bcmgenet_mii_init(struct net_device *dev)
 	return 0;
 
 out:
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 	mdiobus_free(priv->mii_bus);
@@ -649,7 +652,10 @@ out:
 void bcmgenet_mii_exit(struct net_device *dev)
 {
 	struct bcmgenet_priv *priv = netdev_priv(dev);
+	struct device_node *dn = priv->pdev->dev.of_node;
 
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
 	mdiobus_free(priv->mii_bus);

drivers/net/ethernet/freescale/fec_main.c

@@ -3475,6 +3475,8 @@ failed_regulator:
 failed_clk_ipg:
 	fec_enet_clk_enable(ndev, false);
 failed_clk:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
 failed_phy:
 	of_node_put(phy_node);
 failed_ioremap:
@@ -3488,6 +3490,7 @@ fec_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
+	struct device_node *np = pdev->dev.of_node;
 
 	cancel_work_sync(&fep->tx_timeout_work);
 	fec_ptp_stop(pdev);
@@ -3495,6 +3498,8 @@ fec_drv_remove(struct platform_device *pdev)
 	fec_enet_mii_remove(fep);
 	if (fep->reg_phy)
 		regulator_disable(fep->reg_phy);
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
 	of_node_put(fep->phy_node);
 	free_netdev(ndev);
 

drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c

@@ -980,7 +980,7 @@ static int fs_enet_probe(struct platform_device *ofdev)
 		err = clk_prepare_enable(clk);
 		if (err) {
 			ret = err;
-			goto out_free_fpi;
+			goto out_deregister_fixed_link;
 		}
 		fpi->clk_per = clk;
 	}
@@ -1061,6 +1061,9 @@ out_put:
 	of_node_put(fpi->phy_node);
 	if (fpi->clk_per)
 		clk_disable_unprepare(fpi->clk_per);
+out_deregister_fixed_link:
+	if (of_phy_is_fixed_link(ofdev->dev.of_node))
+		of_phy_deregister_fixed_link(ofdev->dev.of_node);
 out_free_fpi:
 	kfree(fpi);
 	return ret;
@@ -1079,6 +1082,8 @@ static int fs_enet_remove(struct platform_device *ofdev)
 	of_node_put(fep->fpi->phy_node);
 	if (fep->fpi->clk_per)
 		clk_disable_unprepare(fep->fpi->clk_per);
+	if (of_phy_is_fixed_link(ofdev->dev.of_node))
+		of_phy_deregister_fixed_link(ofdev->dev.of_node);
 	free_netdev(ndev);
 	return 0;
 }

drivers/net/ethernet/freescale/gianfar.c

@@ -1312,6 +1312,7 @@ static void gfar_init_addr_hash_table(struct gfar_private *priv)
  */
 static int gfar_probe(struct platform_device *ofdev)
 {
+	struct device_node *np = ofdev->dev.of_node;
 	struct net_device *dev = NULL;
 	struct gfar_private *priv = NULL;
 	int err = 0, i;
@@ -1462,6 +1463,8 @@ static int gfar_probe(struct platform_device *ofdev)
 	return 0;
 
 register_fail:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
 	unmap_group_regs(priv);
 	gfar_free_rx_queues(priv);
 	gfar_free_tx_queues(priv);
@@ -1474,11 +1477,16 @@ register_fail:
 static int gfar_remove(struct platform_device *ofdev)
 {
 	struct gfar_private *priv = platform_get_drvdata(ofdev);
+	struct device_node *np = ofdev->dev.of_node;
 
 	of_node_put(priv->phy_node);
 	of_node_put(priv->tbi_node);
 
 	unregister_netdev(priv->ndev);
+
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+
 	unmap_group_regs(priv);
 	gfar_free_rx_queues(priv);
 	gfar_free_tx_queues(priv);

drivers/net/ethernet/freescale/ucc_geth.c

@@ -3868,9 +3868,8 @@ static int ucc_geth_probe(struct platform_device* ofdev)
 	dev = alloc_etherdev(sizeof(*ugeth));
 
 	if (dev == NULL) {
-		of_node_put(ug_info->tbi_node);
-		of_node_put(ug_info->phy_node);
-		return -ENOMEM;
+		err = -ENOMEM;
+		goto err_deregister_fixed_link;
 	}
 
 	ugeth = netdev_priv(dev);
@@ -3907,10 +3906,7 @@ static int ucc_geth_probe(struct platform_device* ofdev)
 		if (netif_msg_probe(ugeth))
 			pr_err("%s: Cannot register net device, aborting\n",
 			       dev->name);
-		free_netdev(dev);
-		of_node_put(ug_info->tbi_node);
-		of_node_put(ug_info->phy_node);
-		return err;
+		goto err_free_netdev;
 	}
 
 	mac_addr = of_get_mac_address(np);
@@ -3923,16 +3919,29 @@ static int ucc_geth_probe(struct platform_device* ofdev)
 	ugeth->node = np;
 
 	return 0;
+
+err_free_netdev:
+	free_netdev(dev);
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+	of_node_put(ug_info->tbi_node);
+	of_node_put(ug_info->phy_node);
+
+	return err;
 }
 
 static int ucc_geth_remove(struct platform_device* ofdev)
 {
 	struct net_device *dev = platform_get_drvdata(ofdev);
 	struct ucc_geth_private *ugeth = netdev_priv(dev);
+	struct device_node *np = ofdev->dev.of_node;
 
 	unregister_netdev(dev);
 	free_netdev(dev);
 	ucc_geth_memclean(ugeth);
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
 	of_node_put(ugeth->ug_info->tbi_node);
 	of_node_put(ugeth->ug_info->phy_node);
 

drivers/net/ethernet/marvell/mvneta.c

@@ -4191,6 +4191,8 @@ err_clk:
 	clk_disable_unprepare(pp->clk);
 err_put_phy_node:
 	of_node_put(phy_node);
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 err_free_irq:
 	irq_dispose_mapping(dev->irq);
 err_free_netdev:
@@ -4202,6 +4204,7 @@ err_free_netdev:
 static int mvneta_remove(struct platform_device *pdev)
 {
 	struct net_device  *dev = platform_get_drvdata(pdev);
+	struct device_node *dn = pdev->dev.of_node;
 	struct mvneta_port *pp = netdev_priv(dev);
 
 	unregister_netdev(dev);
@@ -4209,6 +4212,8 @@ static int mvneta_remove(struct platform_device *pdev)
 	clk_disable_unprepare(pp->clk);
 	free_percpu(pp->ports);
 	free_percpu(pp->stats);
+	if (of_phy_is_fixed_link(dn))
+		of_phy_deregister_fixed_link(dn);
 	irq_dispose_mapping(dev->irq);
 	of_node_put(pp->phy_node);
 	free_netdev(dev);

drivers/net/ethernet/mediatek/mtk_eth_soc.c

@@ -318,6 +318,8 @@ static int mtk_phy_connect(struct net_device *dev)
 	return 0;
 
 err_phy:
+	if (of_phy_is_fixed_link(mac->of_node))
+		of_phy_deregister_fixed_link(mac->of_node);
 	of_node_put(np);
 	dev_err(eth->dev, "%s: invalid phy\n", __func__);
 	return -EINVAL;
@@ -1923,6 +1925,8 @@ static void mtk_uninit(struct net_device *dev)
 	struct mtk_eth *eth = mac->hw;
 
 	phy_disconnect(dev->phydev);
+	if (of_phy_is_fixed_link(mac->of_node))
+		of_phy_deregister_fixed_link(mac->of_node);
 	mtk_irq_disable(eth, MTK_QDMA_INT_MASK, ~0);
 	mtk_irq_disable(eth, MTK_PDMA_INT_MASK, ~0);
 }

drivers/net/ethernet/renesas/ravb_main.c

@@ -1008,7 +1008,8 @@ static int ravb_phy_init(struct net_device *ndev)
 	of_node_put(pn);
 	if (!phydev) {
 		netdev_err(ndev, "failed to connect PHY\n");
-		return -ENOENT;
+		err = -ENOENT;
+		goto err_deregister_fixed_link;
 	}
 
 	/* This driver only support 10/100Mbit speeds on Gen3
@@ -1020,8 +1021,7 @@ static int ravb_phy_init(struct net_device *ndev)
 		err = phy_set_max_speed(phydev, SPEED_100);
 		if (err) {
 			netdev_err(ndev, "failed to limit PHY to 100Mbit/s\n");
-			phy_disconnect(phydev);
-			return err;
+			goto err_phy_disconnect;
 		}
 
 		netdev_info(ndev, "limited PHY to 100Mbit/s\n");
@@ -1033,6 +1033,14 @@ static int ravb_phy_init(struct net_device *ndev)
 	phy_attached_info(phydev);
 
 	return 0;
+
+err_phy_disconnect:
+	phy_disconnect(phydev);
+err_deregister_fixed_link:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+
+	return err;
 }
 
 /* PHY control start function */
@@ -1634,6 +1642,7 @@ static void ravb_set_rx_mode(struct net_device *ndev)
 /* Device close function for Ethernet AVB */
 static int ravb_close(struct net_device *ndev)
 {
+	struct device_node *np = ndev->dev.parent->of_node;
 	struct ravb_private *priv = netdev_priv(ndev);
 	struct ravb_tstamp_skb *ts_skb, *ts_skb2;
 
@@ -1663,6 +1672,8 @@ static int ravb_close(struct net_device *ndev)
 	if (ndev->phydev) {
 		phy_stop(ndev->phydev);
 		phy_disconnect(ndev->phydev);
+		if (of_phy_is_fixed_link(np))
+			of_phy_deregister_fixed_link(np);
 	}
 
 	if (priv->chip_id != RCAR_GEN2) {

drivers/net/ethernet/synopsys/dwc_eth_qos.c

@@ -2881,7 +2881,7 @@ static int dwceqos_probe(struct platform_device *pdev)
 	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;
@@ -2889,14 +2889,14 @@ static int dwceqos_probe(struct platform_device *pdev)
 	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);
@@ -2914,7 +2914,7 @@ static int dwceqos_probe(struct platform_device *pdev)
 	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);
@@ -2924,7 +2924,7 @@ static int dwceqos_probe(struct platform_device *pdev)
 	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))
@@ -2935,11 +2935,14 @@ static int dwceqos_probe(struct platform_device *pdev)
 	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:
@@ -2959,8 +2962,11 @@ static int dwceqos_remove(struct platform_device *pdev)
 	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);
 

drivers/net/ethernet/ti/cpsw.c

@@ -2459,20 +2459,8 @@ static void cpsw_remove_dt(struct platform_device *pdev)
 		if (strcmp(slave_node->name, "slave"))
 			continue;
 
-		if (of_phy_is_fixed_link(slave_node)) {
-			struct phy_device *phydev;
-
-			phydev = of_phy_find_device(slave_node);
-			if (phydev) {
-				fixed_phy_unregister(phydev);
-				/* Put references taken by
-				 * of_phy_find_device() and
-				 * of_phy_register_fixed_link().
-				 */
-				phy_device_free(phydev);
-				phy_device_free(phydev);
-			}
-		}
+		if (of_phy_is_fixed_link(slave_node))
+			of_phy_deregister_fixed_link(slave_node);
 
 		of_node_put(slave_data->phy_node);
 

drivers/net/ethernet/ti/davinci_emac.c

@@ -1767,6 +1767,7 @@ static int davinci_emac_try_get_mac(struct platform_device *pdev,
  */
 static int davinci_emac_probe(struct platform_device *pdev)
 {
+	struct device_node *np = pdev->dev.of_node;
 	int rc = 0;
 	struct resource *res, *res_ctrl;
 	struct net_device *ndev;
@@ -1805,7 +1806,7 @@ static int davinci_emac_probe(struct platform_device *pdev)
 	if (!pdata) {
 		dev_err(&pdev->dev, "no platform data\n");
 		rc = -ENODEV;
-		goto no_pdata;
+		goto err_free_netdev;
 	}
 
 	/* MAC addr and PHY mask , RMII enable info from platform_data */
@@ -1941,6 +1942,10 @@ no_cpdma_chan:
 		cpdma_chan_destroy(priv->rxchan);
 	cpdma_ctlr_destroy(priv->dma);
 no_pdata:
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
+	of_node_put(priv->phy_node);
+err_free_netdev:
 	free_netdev(ndev);
 	return rc;
 }
@@ -1956,6 +1961,7 @@ static int davinci_emac_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct emac_priv *priv = netdev_priv(ndev);
+	struct device_node *np = pdev->dev.of_node;
 
 	dev_notice(&ndev->dev, "DaVinci EMAC: davinci_emac_remove()\n");
 
@@ -1968,6 +1974,8 @@ static int davinci_emac_remove(struct platform_device *pdev)
 	unregister_netdev(ndev);
 	of_node_put(priv->phy_node);
 	pm_runtime_disable(&pdev->dev);
+	if (of_phy_is_fixed_link(np))
+		of_phy_deregister_fixed_link(np);
 	free_netdev(ndev);
 
 	return 0;

drivers/of/of_mdio.c

@@ -490,3 +490,18 @@ int of_phy_register_fixed_link(struct device_node *np)
 	return -ENODEV;
 }
 EXPORT_SYMBOL(of_phy_register_fixed_link);
+
+void of_phy_deregister_fixed_link(struct device_node *np)
+{
+	struct phy_device *phydev;
+
+	phydev = of_phy_find_device(np);
+	if (!phydev)
+		return;
+
+	fixed_phy_unregister(phydev);
+
+	put_device(&phydev->mdio.dev);	/* of_phy_find_device() */
+	phy_device_free(phydev);	/* fixed_phy_register() */
+}
+EXPORT_SYMBOL(of_phy_deregister_fixed_link);

include/linux/of_mdio.h

@@ -29,6 +29,7 @@ struct phy_device *of_phy_attach(struct net_device *dev,
 extern struct mii_bus *of_mdio_find_bus(struct device_node *mdio_np);
 extern int of_mdio_parse_addr(struct device *dev, const struct device_node *np);
 extern int of_phy_register_fixed_link(struct device_node *np);
+extern void of_phy_deregister_fixed_link(struct device_node *np);
 extern bool of_phy_is_fixed_link(struct device_node *np);
 
 #else /* CONFIG_OF */
@@ -83,6 +84,9 @@ static inline int of_phy_register_fixed_link(struct device_node *np)
 {
 	return -ENOSYS;
 }
+static inline void of_phy_deregister_fixed_link(struct device_node *np)
+{
+}
 static inline bool of_phy_is_fixed_link(struct device_node *np)
 {
 	return false;

net/dsa/dsa.c

@@ -506,16 +506,8 @@ dsa_switch_setup(struct dsa_switch_tree *dst, int index,
 
 void dsa_cpu_dsa_destroy(struct device_node *port_dn)
 {
-	struct phy_device *phydev;
-
-	if (of_phy_is_fixed_link(port_dn)) {
-		phydev = of_phy_find_device(port_dn);
-		if (phydev) {
-			fixed_phy_unregister(phydev);
-			put_device(&phydev->mdio.dev);
-			phy_device_free(phydev);
-		}
-	}
+	if (of_phy_is_fixed_link(port_dn))
+		of_phy_deregister_fixed_link(port_dn);
 }
 
 static void dsa_switch_destroy(struct dsa_switch *ds)

net/dsa/slave.c

@@ -1125,7 +1125,7 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 	p->phy_interface = mode;
 
 	phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
-	if (of_phy_is_fixed_link(port_dn)) {
+	if (!phy_dn && of_phy_is_fixed_link(port_dn)) {
 		/* In the case of a fixed PHY, the DT node associated
 		 * to the fixed PHY is the Port DT node
 		 */
@@ -1135,7 +1135,7 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 			return ret;
 		}
 		phy_is_fixed = true;
-		phy_dn = port_dn;
+		phy_dn = of_node_get(port_dn);
 	}
 
 	if (ds->ops->get_phy_flags)
@@ -1154,6 +1154,7 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 			ret = dsa_slave_phy_connect(p, slave_dev, phy_id);
 			if (ret) {
 				netdev_err(slave_dev, "failed to connect to phy%d: %d\n", phy_id, ret);
+				of_node_put(phy_dn);
 				return ret;
 			}
 		} else {
@@ -1162,6 +1163,8 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 						phy_flags,
 						p->phy_interface);
 		}
+
+		of_node_put(phy_dn);
 	}
 
 	if (p->phy && phy_is_fixed)
@@ -1174,6 +1177,8 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
 		ret = dsa_slave_phy_connect(p, slave_dev, p->port);
 		if (ret) {
 			netdev_err(slave_dev, "failed to connect to port %d: %d\n", p->port, ret);
+			if (phy_is_fixed)
+				of_phy_deregister_fixed_link(port_dn);
 			return ret;
 		}
 	}
@@ -1289,10 +1294,18 @@ int dsa_slave_create(struct dsa_switch *ds, struct device *parent,
 void dsa_slave_destroy(struct net_device *slave_dev)
 {
 	struct dsa_slave_priv *p = netdev_priv(slave_dev);
+	struct dsa_switch *ds = p->parent;
+	struct device_node *port_dn;
+
+	port_dn = ds->ports[p->port].dn;
 
 	netif_carrier_off(slave_dev);
-	if (p->phy)
+	if (p->phy) {
 		phy_disconnect(p->phy);
+
+		if (of_phy_is_fixed_link(port_dn))
+			of_phy_deregister_fixed_link(port_dn);
+	}
 	unregister_netdev(slave_dev);
 	free_netdev(slave_dev);
 }