phylib: move to dynamic allocation of struct mii_bus

This patch introduces mdiobus_alloc() and mdiobus_free(), and
makes all mdio bus drivers use these functions to allocate their
struct mii_bus'es dynamically.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Andy Fleming <afleming@freescale.com>

1 files changed, 29 insertions, 20 deletions

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 045361fe3d6..01f7a31bac7 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -195,8 +195,8 @@ static int macb_mii_probe(struct net_device *dev)
 
 	/* find the first phy */
 	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
-		if (bp->mii_bus.phy_map[phy_addr]) {
-			phydev = bp->mii_bus.phy_map[phy_addr];
+		if (bp->mii_bus->phy_map[phy_addr]) {
+			phydev = bp->mii_bus->phy_map[phy_addr];
 			break;
 		}
 	}
@@ -244,30 +244,36 @@ static int macb_mii_init(struct macb *bp)
 	/* Enable managment port */
 	macb_writel(bp, NCR, MACB_BIT(MPE));
 
-	bp->mii_bus.name = "MACB_mii_bus";
-	bp->mii_bus.read = &macb_mdio_read;
-	bp->mii_bus.write = &macb_mdio_write;
-	bp->mii_bus.reset = &macb_mdio_reset;
-	snprintf(bp->mii_bus.id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
-	bp->mii_bus.priv = bp;
-	bp->mii_bus.parent = &bp->dev->dev;
+	bp->mii_bus = mdiobus_alloc();
+	if (bp->mii_bus == NULL) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	bp->mii_bus->name = "MACB_mii_bus";
+	bp->mii_bus->read = &macb_mdio_read;
+	bp->mii_bus->write = &macb_mdio_write;
+	bp->mii_bus->reset = &macb_mdio_reset;
+	snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%x", bp->pdev->id);
+	bp->mii_bus->priv = bp;
+	bp->mii_bus->parent = &bp->dev->dev;
 	pdata = bp->pdev->dev.platform_data;
 
 	if (pdata)
-		bp->mii_bus.phy_mask = pdata->phy_mask;
+		bp->mii_bus->phy_mask = pdata->phy_mask;
 
-	bp->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-	if (!bp->mii_bus.irq) {
+	bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+	if (!bp->mii_bus->irq) {
 		err = -ENOMEM;
-		goto err_out;
+		goto err_out_free_mdiobus;
 	}
 
 	for (i = 0; i < PHY_MAX_ADDR; i++)
-		bp->mii_bus.irq[i] = PHY_POLL;
+		bp->mii_bus->irq[i] = PHY_POLL;
 
-	platform_set_drvdata(bp->dev, &bp->mii_bus);
+	platform_set_drvdata(bp->dev, bp->mii_bus);
 
-	if (mdiobus_register(&bp->mii_bus))
+	if (mdiobus_register(bp->mii_bus))
 		goto err_out_free_mdio_irq;
 
 	if (macb_mii_probe(bp->dev) != 0) {
@@ -277,9 +283,11 @@ static int macb_mii_init(struct macb *bp)
 	return 0;
 
 err_out_unregister_bus:
-	mdiobus_unregister(&bp->mii_bus);
+	mdiobus_unregister(bp->mii_bus);
 err_out_free_mdio_irq:
-	kfree(bp->mii_bus.irq);
+	kfree(bp->mii_bus->irq);
+err_out_free_mdiobus:
+	mdiobus_free(bp->mii_bus);
 err_out:
 	return err;
 }
@@ -1261,8 +1269,9 @@ static int __exit macb_remove(struct platform_device *pdev)
 		bp = netdev_priv(dev);
 		if (bp->phy_dev)
 			phy_disconnect(bp->phy_dev);
-		mdiobus_unregister(&bp->mii_bus);
-		kfree(bp->mii_bus.irq);
+		mdiobus_unregister(bp->mii_bus);
+		kfree(bp->mii_bus->irq);
+		mdiobus_free(bp->mii_bus);
 		unregister_netdev(dev);
 		free_irq(dev->irq, dev);
 		iounmap(bp->regs);