sh_eth: Simplify MDIO bus initialization and release

The network device passed to the sh_mdio_init and sh_mdio_release
functions is only used to access the sh_eth_private instance. Pass it
directly to those functions.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 19 deletions

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 443f14f0d8a0..e9224f285c02 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2583,29 +2583,24 @@ static void sh_eth_tsu_init(struct sh_eth_private *mdp)
 }
 
 /* MDIO bus release function */
-static int sh_mdio_release(struct net_device *ndev)
+static int sh_mdio_release(struct sh_eth_private *mdp)
 {
-        struct mii_bus *bus = dev_get_drvdata(&ndev->dev);
-
         /* unregister mdio bus */
-        mdiobus_unregister(bus);
-
-        /* remove mdio bus info from net_device */
-        dev_set_drvdata(&ndev->dev, NULL);
+        mdiobus_unregister(mdp->mii_bus);
 
         /* free bitbang info */
-        free_mdio_bitbang(bus);
+        free_mdio_bitbang(mdp->mii_bus);
 
         return 0;
 }
 
 /* MDIO bus init function */
-static int sh_mdio_init(struct net_device *ndev, int id,
+static int sh_mdio_init(struct sh_eth_private *mdp,
                         struct sh_eth_plat_data *pd)
 {
         int ret, i;
         struct bb_info *bitbang;
-        struct sh_eth_private *mdp = netdev_priv(ndev);
+        struct platform_device *pdev = mdp->pdev;
         struct device *dev = &mdp->pdev->dev;
 
         /* create bit control struct for PHY */
@@ -2635,7 +2630,7 @@ static int sh_mdio_init(struct net_device *ndev, int id,
         mdp->mii_bus->name = "sh_mii";
         mdp->mii_bus->parent = dev;
         snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
-                 mdp->pdev->name, id);
+                 pdev->name, pdev->id);
 
         /* PHY IRQ */
         mdp->mii_bus->irq = devm_kzalloc(dev, sizeof(int) * PHY_MAX_ADDR,
@@ -2645,10 +2640,9 @@ static int sh_mdio_init(struct net_device *ndev, int id,
                 goto out_free_bus;
         }
 
-        /* register mdio bus */
-        if (ndev->dev.parent->of_node) {
-                ret = of_mdiobus_register(mdp->mii_bus,
-                                          ndev->dev.parent->of_node);
+        /* register MDIO bus */
+        if (dev->of_node) {
+                ret = of_mdiobus_register(mdp->mii_bus, dev->of_node);
         } else {
                 for (i = 0; i < PHY_MAX_ADDR; i++)
                         mdp->mii_bus->irq[i] = PHY_POLL;
@@ -2661,8 +2655,6 @@ static int sh_mdio_init(struct net_device *ndev, int id,
         if (ret)
                 goto out_free_bus;
 
-        dev_set_drvdata(&ndev->dev, mdp->mii_bus);
-
         return 0;
 
 out_free_bus:
@@ -2907,7 +2899,7 @@ static int sh_eth_drv_probe(struct platform_device *pdev)
                 goto out_napi_del;
 
         /* mdio bus init */
-        ret = sh_mdio_init(ndev, pdev->id, pd);
+        ret = sh_mdio_init(mdp, pd);
         if (ret) {
                 dev_err(&ndev->dev, "failed to initialise MDIO\n");
                 goto out_unregister;
@@ -2941,7 +2933,7 @@ static int sh_eth_drv_remove(struct platform_device *pdev)
         struct net_device *ndev = platform_get_drvdata(pdev);
         struct sh_eth_private *mdp = netdev_priv(ndev);
 
-        sh_mdio_release(ndev);
+        sh_mdio_release(mdp);
         unregister_netdev(ndev);
         netif_napi_del(&mdp->napi);
         pm_runtime_disable(&pdev->dev);