net: ag71xx: use devm for of_mdiobus_register

Allows removing ag71xx_mdio_remove.

Removed ag.mii_bus variable. Local one can be used with devm. Easier to
reason about as mii_bus is only used here now. Also shrinks the struct
slightly.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://patch.msgid.link/20240813170516.7301-3-rosenp@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/atheros/ag71xx.c b/drivers/net/ethernet/atheros/ag71xx.c
index 9cd2b1168740e9bcfe6e58fc7162510d7246831f..7bc0fb33e582fd9d261f9efb0dd43e2e88550535 100644 (file)
--- a/drivers/net/ethernet/atheros/ag71xx.c
+++ b/drivers/net/ethernet/atheros/ag71xx.c
@@ -380,7 +380,6 @@ struct ag71xx {
        int mac_idx;
 
        struct reset_control *mdio_reset;
-       struct mii_bus *mii_bus;
        struct clk *clk_mdio;
        struct clk *clk_eth;
 };
@@ -697,7 +696,6 @@ static int ag71xx_mdio_probe(struct ag71xx *ag)
        int err;
 
        np = dev->of_node;
-       ag->mii_bus = NULL;
 
        ag->clk_mdio = devm_clk_get_enabled(dev, "mdio");
        if (IS_ERR(ag->clk_mdio)) {
@@ -731,22 +729,14 @@ static int ag71xx_mdio_probe(struct ag71xx *ag)
        }
 
        mnp = of_get_child_by_name(np, "mdio");
-       err = of_mdiobus_register(mii_bus, mnp);
+       err = devm_of_mdiobus_register(dev, mii_bus, mnp);
        of_node_put(mnp);
        if (err)
                return err;
 
-       ag->mii_bus = mii_bus;
-
        return 0;
 }
 
-static void ag71xx_mdio_remove(struct ag71xx *ag)
-{
-       if (ag->mii_bus)
-               mdiobus_unregister(ag->mii_bus);
-}
-
 static void ag71xx_hw_stop(struct ag71xx *ag)
 {
        /* disable all interrupts and stop the rx/tx engine */
@@ -1932,14 +1922,14 @@ static int ag71xx_probe(struct platform_device *pdev)
        err = ag71xx_phylink_setup(ag);
        if (err) {
                netif_err(ag, probe, ndev, "failed to setup phylink (%d)\n", err);
-               goto err_mdio_remove;
+               return err;
        }
 
        err = register_netdev(ndev);
        if (err) {
                netif_err(ag, probe, ndev, "unable to register net device\n");
                platform_set_drvdata(pdev, NULL);
-               goto err_mdio_remove;
+               return err;
        }
 
        netif_info(ag, probe, ndev, "Atheros AG71xx at 0x%08lx, irq %d, mode:%s\n",
@@ -1947,23 +1937,16 @@ static int ag71xx_probe(struct platform_device *pdev)
                   phy_modes(ag->phy_if_mode));
 
        return 0;
-
-err_mdio_remove:
-       ag71xx_mdio_remove(ag);
-       return err;
 }
 
 static void ag71xx_remove(struct platform_device *pdev)
 {
        struct net_device *ndev = platform_get_drvdata(pdev);
-       struct ag71xx *ag;
 
        if (!ndev)
                return;
 
-       ag = netdev_priv(ndev);
        unregister_netdev(ndev);
-       ag71xx_mdio_remove(ag);
        platform_set_drvdata(pdev, NULL);
 }