[PATCH net 14/16] net: ethernet: dwc_eth_qos: fix fixed-link phydev leaks

[Johan Hovold]

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 <jo...@kernel.org>
---
 drivers/net/ethernet/synopsys/dwc_eth_qos.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/synopsys/dwc_eth_qos.c 
b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
index 4ba2421e625d..97d64bfed465 100644
--- a/drivers/net/ethernet/synopsys/dwc_eth_qos.c
+++ b/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);
 
-- 
2.7.3