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>

23 files changed, 279 insertions, 185 deletions

diff --git a/drivers/net/au1000_eth.c b/drivers/net/au1000_eth.c
index 92c16c37ff2..7b92201a7b5 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -290,7 +290,7 @@ static int mii_probe (struct net_device *dev)
 
         if(aup->mac_id == 0) { /* get PHY0 */
 # if defined(AU1XXX_PHY0_ADDR)
-                phydev = au_macs[AU1XXX_PHY0_BUSID]->mii_bus.phy_map[AU1XXX_PHY0_ADDR];
+                phydev = au_macs[AU1XXX_PHY0_BUSID]->mii_bus->phy_map[AU1XXX_PHY0_ADDR];
 # else
                 printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
                         dev->name);
@@ -298,7 +298,7 @@ static int mii_probe (struct net_device *dev)
 # endif /* defined(AU1XXX_PHY0_ADDR) */
         } else if (aup->mac_id == 1) { /* get PHY1 */
 # if defined(AU1XXX_PHY1_ADDR)
-                phydev = au_macs[AU1XXX_PHY1_BUSID]->mii_bus.phy_map[AU1XXX_PHY1_ADDR];
+                phydev = au_macs[AU1XXX_PHY1_BUSID]->mii_bus->phy_map[AU1XXX_PHY1_ADDR];
 # else
                 printk (KERN_INFO DRV_NAME ":%s: using PHY-less setup\n",
                         dev->name);
@@ -311,8 +311,8 @@ static int mii_probe (struct net_device *dev)
 
         /* find the first (lowest address) PHY on the current MAC's MII bus */
         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
-                if (aup->mii_bus.phy_map[phy_addr]) {
-                        phydev = aup->mii_bus.phy_map[phy_addr];
+                if (aup->mii_bus->phy_map[phy_addr]) {
+                        phydev = aup->mii_bus->phy_map[phy_addr];
 # if !defined(AU1XXX_PHY_SEARCH_HIGHEST_ADDR)
                         break; /* break out with first one found */
 # endif
@@ -331,7 +331,7 @@ static int mii_probe (struct net_device *dev)
                  * the MAC0 MII bus */
                 for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
                         struct phy_device *const tmp_phydev =
-                                au_macs[0]->mii_bus.phy_map[phy_addr];
+                                au_macs[0]->mii_bus->phy_map[phy_addr];
 
                         if (!tmp_phydev)
                                 continue; /* no PHY here... */
@@ -698,28 +698,32 @@ static struct net_device * au1000_probe(int port_num)
         *aup->enable = 0;
         aup->mac_enabled = 0;
 
-        aup->mii_bus.priv = dev;
-        aup->mii_bus.read = mdiobus_read;
-        aup->mii_bus.write = mdiobus_write;
-        aup->mii_bus.reset = mdiobus_reset;
-        aup->mii_bus.name = "au1000_eth_mii";
-        snprintf(aup->mii_bus.id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
-        aup->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+        aup->mii_bus = mdiobus_alloc();
+        if (aup->mii_bus == NULL)
+                goto err_out;
+
+        aup->mii_bus->priv = dev;
+        aup->mii_bus->read = mdiobus_read;
+        aup->mii_bus->write = mdiobus_write;
+        aup->mii_bus->reset = mdiobus_reset;
+        aup->mii_bus->name = "au1000_eth_mii";
+        snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%x", aup->mac_id);
+        aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
         for(i = 0; i < PHY_MAX_ADDR; ++i)
-                aup->mii_bus.irq[i] = PHY_POLL;
+                aup->mii_bus->irq[i] = PHY_POLL;
 
         /* if known, set corresponding PHY IRQs */
 #if defined(AU1XXX_PHY_STATIC_CONFIG)
 # if defined(AU1XXX_PHY0_IRQ)
         if (AU1XXX_PHY0_BUSID == aup->mac_id)
-                aup->mii_bus.irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ;
+                aup->mii_bus->irq[AU1XXX_PHY0_ADDR] = AU1XXX_PHY0_IRQ;
 # endif
 # if defined(AU1XXX_PHY1_IRQ)
         if (AU1XXX_PHY1_BUSID == aup->mac_id)
-                aup->mii_bus.irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ;
+                aup->mii_bus->irq[AU1XXX_PHY1_ADDR] = AU1XXX_PHY1_IRQ;
 # endif
 #endif
-        mdiobus_register(&aup->mii_bus);
+        mdiobus_register(aup->mii_bus);
 
         if (mii_probe(dev) != 0) {
                 goto err_out;
@@ -775,6 +779,11 @@ static struct net_device * au1000_probe(int port_num)
         return dev;
 
 err_out:
+        if (aup->mii_bus != NULL) {
+                mdiobus_unregister(aup->mii_bus);
+                mdiobus_free(aup->mii_bus);
+        }
+
         /* here we should have a valid dev plus aup-> register addresses
          * so we can reset the mac properly.*/
         reset_mac(dev);
@@ -1005,6 +1014,8 @@ static void __exit au1000_cleanup_module(void)
                 if (dev) {
                         aup = (struct au1000_private *) dev->priv;
                         unregister_netdev(dev);
+                        mdiobus_unregister(aup->mii_bus);
+                        mdiobus_free(aup->mii_bus);
                         for (j = 0; j < NUM_RX_DMA; j++)
                                 if (aup->rx_db_inuse[j])
                                         ReleaseDB(aup, aup->rx_db_inuse[j]);
diff --git a/drivers/net/au1000_eth.h b/drivers/net/au1000_eth.h
index f3baeaa1285..824ecd5ff3a 100644
--- a/drivers/net/au1000_eth.h
+++ b/drivers/net/au1000_eth.h
@@ -106,7 +106,7 @@ struct au1000_private {
         int old_duplex;
 
         struct phy_device *phy_dev;
-        struct mii_bus mii_bus;
+        struct mii_bus *mii_bus;
 
         /* These variables are just for quick access to certain regs addresses. */
         volatile mac_reg_t *mac;  /* mac registers                      */
diff --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c
index df896e23e2c..a0d41c5d97d 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -398,7 +398,7 @@ static int mii_probe(struct net_device *dev)
 
         /* search for connect PHY device */
         for (i = 0; i < PHY_MAX_ADDR; i++) {
-                struct phy_device *const tmp_phydev = lp->mii_bus.phy_map[i];
+                struct phy_device *const tmp_phydev = lp->mii_bus->phy_map[i];
 
                 if (!tmp_phydev)
                         continue; /* no PHY here... */
@@ -1058,17 +1058,21 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
         setup_mac_addr(ndev->dev_addr);
 
         /* MDIO bus initial */
-        lp->mii_bus.priv = ndev;
-        lp->mii_bus.read = mdiobus_read;
-        lp->mii_bus.write = mdiobus_write;
-        lp->mii_bus.reset = mdiobus_reset;
-        lp->mii_bus.name = "bfin_mac_mdio";
-        snprintf(lp->mii_bus.id, MII_BUS_ID_SIZE, "0");
-        lp->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
+        lp->mii_bus = mdiobus_alloc();
+        if (lp->mii_bus == NULL)
+                goto out_err_mdiobus_alloc;
+
+        lp->mii_bus->priv = ndev;
+        lp->mii_bus->read = mdiobus_read;
+        lp->mii_bus->write = mdiobus_write;
+        lp->mii_bus->reset = mdiobus_reset;
+        lp->mii_bus->name = "bfin_mac_mdio";
+        snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "0");
+        lp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
         for (i = 0; i < PHY_MAX_ADDR; ++i)
-                lp->mii_bus.irq[i] = PHY_POLL;
+                lp->mii_bus->irq[i] = PHY_POLL;
 
-        rc = mdiobus_register(&lp->mii_bus);
+        rc = mdiobus_register(lp->mii_bus);
         if (rc) {
                 dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
                 goto out_err_mdiobus_register;
@@ -1121,8 +1125,10 @@ out_err_reg_ndev:
         free_irq(IRQ_MAC_RX, ndev);
 out_err_request_irq:
 out_err_mii_probe:
-        mdiobus_unregister(&lp->mii_bus);
+        mdiobus_unregister(lp->mii_bus);
 out_err_mdiobus_register:
+        mdiobus_free(lp->mii_bus);
+out_err_mdiobus_alloc:
         peripheral_free_list(pin_req);
 out_err_setup_pin_mux:
 out_err_probe_mac:
@@ -1139,7 +1145,8 @@ static int __devexit bfin_mac_remove(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, NULL);
 
-        mdiobus_unregister(&lp->mii_bus);
+        mdiobus_unregister(lp->mii_bus);
+        mdiobus_free(lp->mii_bus);
 
         unregister_netdev(ndev);
 
diff --git a/drivers/net/bfin_mac.h b/drivers/net/bfin_mac.h
index beff51064ff..052b5dce3e3 100644
--- a/drivers/net/bfin_mac.h
+++ b/drivers/net/bfin_mac.h
@@ -66,7 +66,7 @@ struct bfin_mac_local {
         int old_duplex;
 
         struct phy_device *phydev;
-        struct mii_bus mii_bus;
+        struct mii_bus *mii_bus;
 };
 
 extern void bfin_get_ether_addr(char *addr);
diff --git a/drivers/net/cpmac.c b/drivers/net/cpmac.c
index ec6b0af3d46..017a5361b98 100644
--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -302,13 +302,7 @@ static int cpmac_mdio_reset(struct mii_bus *bus)
 
 static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, };
 
-static struct mii_bus cpmac_mii = {
-        .name = "cpmac-mii",
-        .read = cpmac_mdio_read,
-        .write = cpmac_mdio_write,
-        .reset = cpmac_mdio_reset,
-        .irq = mii_irqs,
-};
+static struct mii_bus *cpmac_mii;
 
 static int cpmac_config(struct net_device *dev, struct ifmap *map)
 {
@@ -1116,7 +1110,7 @@ static int __devinit cpmac_probe(struct platform_device *pdev)
         for (phy_id = 0; phy_id < PHY_MAX_ADDR; phy_id++) {
                 if (!(pdata->phy_mask & (1 << phy_id)))
                         continue;
-                if (!cpmac_mii.phy_map[phy_id])
+                if (!cpmac_mii->phy_map[phy_id])
                         continue;
                 break;
         }
@@ -1168,7 +1162,7 @@ static int __devinit cpmac_probe(struct platform_device *pdev)
         priv->msg_enable = netif_msg_init(debug_level, 0xff);
         memcpy(dev->dev_addr, pdata->dev_addr, sizeof(dev->dev_addr));
 
-        priv->phy = phy_connect(dev, cpmac_mii.phy_map[phy_id]->dev.bus_id,
+        priv->phy = phy_connect(dev, cpmac_mii->phy_map[phy_id]->dev.bus_id,
                                 &cpmac_adjust_link, 0, PHY_INTERFACE_MODE_MII);
         if (IS_ERR(priv->phy)) {
                 if (netif_msg_drv(priv))
@@ -1216,11 +1210,22 @@ int __devinit cpmac_init(void)
         u32 mask;
         int i, res;
 
-        cpmac_mii.priv = ioremap(AR7_REGS_MDIO, 256);
+        cpmac_mii = mdiobus_alloc();
+        if (cpmac_mii == NULL)
+                return -ENOMEM;
+
+        cpmac_mii->name = "cpmac-mii";
+        cpmac_mii->read = cpmac_mdio_read;
+        cpmac_mii->write = cpmac_mdio_write;
+        cpmac_mii->reset = cpmac_mdio_reset;
+        cpmac_mii->irq = mii_irqs;
+
+        cpmac_mii->priv = ioremap(AR7_REGS_MDIO, 256);
 
-        if (!cpmac_mii.priv) {
+        if (!cpmac_mii->priv) {
                 printk(KERN_ERR "Can't ioremap mdio registers\n");
-                return -ENXIO;
+                res = -ENXIO;
+                goto fail_alloc;
         }
 
 #warning FIXME: unhardcode gpio&reset bits
@@ -1230,10 +1235,10 @@ int __devinit cpmac_init(void)
         ar7_device_reset(AR7_RESET_BIT_CPMAC_HI);
         ar7_device_reset(AR7_RESET_BIT_EPHY);
 
-        cpmac_mii.reset(&cpmac_mii);
+        cpmac_mii->reset(cpmac_mii);
 
         for (i = 0; i < 300000; i++)
-                if ((mask = cpmac_read(cpmac_mii.priv, CPMAC_MDIO_ALIVE)))
+                if ((mask = cpmac_read(cpmac_mii->priv, CPMAC_MDIO_ALIVE)))
                         break;
                 else
                         cpu_relax();
@@ -1244,10 +1249,10 @@ int __devinit cpmac_init(void)
                 mask = 0;
         }
 
-        cpmac_mii.phy_mask = ~(mask | 0x80000000);
-        snprintf(cpmac_mii.id, MII_BUS_ID_SIZE, "0");
+        cpmac_mii->phy_mask = ~(mask | 0x80000000);
+        snprintf(cpmac_mii->id, MII_BUS_ID_SIZE, "0");
 
-        res = mdiobus_register(&cpmac_mii);
+        res = mdiobus_register(cpmac_mii);
         if (res)
                 goto fail_mii;
 
@@ -1258,10 +1263,13 @@ int __devinit cpmac_init(void)
         return 0;
 
 fail_cpmac:
-        mdiobus_unregister(&cpmac_mii);
+        mdiobus_unregister(cpmac_mii);
 
 fail_mii:
-        iounmap(cpmac_mii.priv);
+        iounmap(cpmac_mii->priv);
+
+fail_alloc:
+        mdiobus_free(cpmac_mii);
 
         return res;
 }
@@ -1269,8 +1277,9 @@ fail_mii:
 void __devexit cpmac_exit(void)
 {
         platform_driver_unregister(&cpmac_driver);
-        mdiobus_unregister(&cpmac_mii);
-        iounmap(cpmac_mii.priv);
+        mdiobus_unregister(cpmac_mii);
+        mdiobus_free(cpmac_mii);
+        iounmap(cpmac_mii->priv);
 }
 
 module_init(cpmac_init);
diff --git a/drivers/net/fec_mpc52xx_phy.c b/drivers/net/fec_mpc52xx_phy.c
index 2a523308c77..08e18bcb970 100644
--- a/drivers/net/fec_mpc52xx_phy.c
+++ b/drivers/net/fec_mpc52xx_phy.c
@@ -83,7 +83,7 @@ static int mpc52xx_fec_mdio_probe(struct of_device *of, const struct of_device_i
         int err;
         int i;
 
-        bus = kzalloc(sizeof(*bus), GFP_KERNEL);
+        bus = mdiobus_alloc();
         if (bus == NULL)
                 return -ENOMEM;
         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -150,7 +150,7 @@ static int mpc52xx_fec_mdio_probe(struct of_device *of, const struct of_device_i
                         irq_dispose_mapping(bus->irq[i]);
         kfree(bus->irq);
         kfree(priv);
-        kfree(bus);
+        mdiobus_free(bus);
 
         return err;
 }
@@ -171,7 +171,7 @@ static int mpc52xx_fec_mdio_remove(struct of_device *of)
                         irq_dispose_mapping(bus->irq[i]);
         kfree(priv);
         kfree(bus->irq);
-        kfree(bus);
+        mdiobus_free(bus);
 
         return 0;
 }
diff --git a/drivers/net/fs_enet/mii-bitbang.c b/drivers/net/fs_enet/mii-bitbang.c
index 2774252c235..49b6645d7e0 100644
--- a/drivers/net/fs_enet/mii-bitbang.c
+++ b/drivers/net/fs_enet/mii-bitbang.c
@@ -218,9 +218,9 @@ out_free_irqs:
 out_unmap_regs:
         iounmap(bitbang->dir);
 out_free_bus:
-        kfree(new_bus);
-out_free_priv:
         free_mdio_bitbang(new_bus);
+out_free_priv:
+        kfree(bitbang);
 out:
         return ret;
 }
@@ -231,12 +231,11 @@ static int fs_enet_mdio_remove(struct of_device *ofdev)
         struct bb_info *bitbang = bus->priv;
 
         mdiobus_unregister(bus);
-        free_mdio_bitbang(bus);
         dev_set_drvdata(&ofdev->dev, NULL);
         kfree(bus->irq);
+        free_mdio_bitbang(bus);
         iounmap(bitbang->dir);
         kfree(bitbang);
-        kfree(bus);
 
         return 0;
 }
diff --git a/drivers/net/fs_enet/mii-fec.c b/drivers/net/fs_enet/mii-fec.c
index 4d89a22317a..28077cc1b94 100644
--- a/drivers/net/fs_enet/mii-fec.c
+++ b/drivers/net/fs_enet/mii-fec.c
@@ -128,7 +128,7 @@ static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
         struct fec_info *fec;
         int ret = -ENOMEM, i;
 
-        new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+        new_bus = mdiobus_alloc();
         if (!new_bus)
                 goto out;
 
@@ -190,7 +190,7 @@ out_res:
 out_fec:
         kfree(fec);
 out_mii:
-        kfree(new_bus);
+        mdiobus_free(new_bus);
 out:
         return ret;
 }
@@ -205,7 +205,7 @@ static int fs_enet_mdio_remove(struct of_device *ofdev)
         kfree(bus->irq);
         iounmap(fec->fecp);
         kfree(fec);
-        kfree(bus);
+        mdiobus_free(bus);
 
         return 0;
 }
diff --git a/drivers/net/gianfar_mii.c b/drivers/net/gianfar_mii.c
index 38895b0e376..bf73eea9801 100644
--- a/drivers/net/gianfar_mii.c
+++ b/drivers/net/gianfar_mii.c
@@ -164,8 +164,7 @@ static int gfar_mdio_probe(struct device *dev)
         if (NULL == dev)
                 return -EINVAL;
 
-        new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
-
+        new_bus = mdiobus_alloc();
         if (NULL == new_bus)
                 return -ENOMEM;
 
@@ -242,7 +241,7 @@ static int gfar_mdio_probe(struct device *dev)
 bus_register_fail:
         iounmap(regs);
 reg_map_fail:
-        kfree(new_bus);
+        mdiobus_free(new_bus);
 
         return err;
 }
@@ -258,7 +257,7 @@ static int gfar_mdio_remove(struct device *dev)
 
         iounmap((void __iomem *)bus->priv);
         bus->priv = NULL;
-        kfree(bus);
+        mdiobus_free(bus);
 
         return 0;
 }
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);
diff --git a/drivers/net/macb.h b/drivers/net/macb.h
index 57b85acf0d1..d3212f6db70 100644
--- a/drivers/net/macb.h
+++ b/drivers/net/macb.h
@@ -384,7 +384,7 @@ struct macb {
 
         unsigned int            rx_pending, tx_pending;
 
-        struct mii_bus          mii_bus;
+        struct mii_bus          *mii_bus;
         struct phy_device       *phy_dev;
         unsigned int            link;
         unsigned int            speed;
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 63400815448..d25a3025113 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -250,7 +250,7 @@ struct mv643xx_eth_shared_private {
         /*
          * Provides access to local SMI interface.
          */
-        struct mii_bus smi_bus;
+        struct mii_bus *smi_bus;
 
         /*
          * If we have access to the error interrupt pin (which is
@@ -2363,15 +2363,19 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
          * Set up and register SMI bus.
          */
         if (pd == NULL || pd->shared_smi == NULL) {
-                msp->smi_bus.priv = msp;
-                msp->smi_bus.name = "mv643xx_eth smi";
-                msp->smi_bus.read = smi_bus_read;
-                msp->smi_bus.write = smi_bus_write,
-                snprintf(msp->smi_bus.id, MII_BUS_ID_SIZE, "%d", pdev->id);
-                msp->smi_bus.parent = &pdev->dev;
-                msp->smi_bus.phy_mask = 0xffffffff;
-                if (mdiobus_register(&msp->smi_bus) < 0)
+                msp->smi_bus = mdiobus_alloc();
+                if (msp->smi_bus == NULL)
                         goto out_unmap;
+
+                msp->smi_bus->priv = msp;
+                msp->smi_bus->name = "mv643xx_eth smi";
+                msp->smi_bus->read = smi_bus_read;
+                msp->smi_bus->write = smi_bus_write,
+                snprintf(msp->smi_bus->id, MII_BUS_ID_SIZE, "%d", pdev->id);
+                msp->smi_bus->parent = &pdev->dev;
+                msp->smi_bus->phy_mask = 0xffffffff;
+                if (mdiobus_register(msp->smi_bus) < 0)
+                        goto out_free_mii_bus;
                 msp->smi = msp;
         } else {
                 msp->smi = platform_get_drvdata(pd->shared_smi);
@@ -2411,6 +2415,8 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 
         return 0;
 
+out_free_mii_bus:
+        mdiobus_free(msp->smi_bus);
 out_unmap:
         iounmap(msp->base);
 out_free:
@@ -2424,8 +2430,10 @@ static int mv643xx_eth_shared_remove(struct platform_device *pdev)
         struct mv643xx_eth_shared_private *msp = platform_get_drvdata(pdev);
         struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data;
 
-        if (pd == NULL || pd->shared_smi == NULL)
-                mdiobus_unregister(&msp->smi_bus);
+        if (pd == NULL || pd->shared_smi == NULL) {
+                mdiobus_free(msp->smi_bus);
+                mdiobus_unregister(msp->smi_bus);
+        }
         if (msp->err_interrupt != NO_IRQ)
                 free_irq(msp->err_interrupt, msp);
         iounmap(msp->base);
@@ -2493,7 +2501,7 @@ static void set_params(struct mv643xx_eth_private *mp,
 static struct phy_device *phy_scan(struct mv643xx_eth_private *mp,
                                    int phy_addr)
 {
-        struct mii_bus *bus = &mp->shared->smi->smi_bus;
+        struct mii_bus *bus = mp->shared->smi->smi_bus;
         struct phy_device *phydev;
         int start;
         int num;
diff --git a/drivers/net/phy/fixed.c b/drivers/net/phy/fixed.c
index 1cec8967a08..b5e13f8d5e3 100644
--- a/drivers/net/phy/fixed.c
+++ b/drivers/net/phy/fixed.c
@@ -24,7 +24,7 @@
 
 struct fixed_mdio_bus {
         int irqs[PHY_MAX_ADDR];
-        struct mii_bus mii_bus;
+        struct mii_bus *mii_bus;
         struct list_head phys;
 };
 
@@ -213,19 +213,27 @@ static int __init fixed_mdio_bus_init(void)
                 goto err_pdev;
         }
 
-        snprintf(fmb->mii_bus.id, MII_BUS_ID_SIZE, "0");
-        fmb->mii_bus.name = "Fixed MDIO Bus";
-        fmb->mii_bus.parent = &pdev->dev;
-        fmb->mii_bus.read = &fixed_mdio_read;
-        fmb->mii_bus.write = &fixed_mdio_write;
-        fmb->mii_bus.irq = fmb->irqs;
+        fmb->mii_bus = mdiobus_alloc();
+        if (fmb->mii_bus == NULL) {
+                ret = -ENOMEM;
+                goto err_mdiobus_reg;
+        }
 
-        ret = mdiobus_register(&fmb->mii_bus);
+        snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "0");
+        fmb->mii_bus->name = "Fixed MDIO Bus";
+        fmb->mii_bus->parent = &pdev->dev;
+        fmb->mii_bus->read = &fixed_mdio_read;
+        fmb->mii_bus->write = &fixed_mdio_write;
+        fmb->mii_bus->irq = fmb->irqs;
+
+        ret = mdiobus_register(fmb->mii_bus);
         if (ret)
-                goto err_mdiobus_reg;
+                goto err_mdiobus_alloc;
 
         return 0;
 
+err_mdiobus_alloc:
+        mdiobus_free(fmb->mii_bus);
 err_mdiobus_reg:
         platform_device_unregister(pdev);
 err_pdev:
@@ -238,7 +246,8 @@ static void __exit fixed_mdio_bus_exit(void)
         struct fixed_mdio_bus *fmb = &platform_fmb;
         struct fixed_phy *fp, *tmp;
 
-        mdiobus_unregister(&fmb->mii_bus);
+        mdiobus_unregister(fmb->mii_bus);
+        mdiobus_free(fmb->mii_bus);
         platform_device_unregister(pdev);
 
         list_for_each_entry_safe(fp, tmp, &fmb->phys, node) {
diff --git a/drivers/net/phy/mdio-bitbang.c b/drivers/net/phy/mdio-bitbang.c
index c01b78013dd..2576055b350 100644
--- a/drivers/net/phy/mdio-bitbang.c
+++ b/drivers/net/phy/mdio-bitbang.c
@@ -165,7 +165,7 @@ struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
 {
         struct mii_bus *bus;
 
-        bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+        bus = mdiobus_alloc();
         if (!bus)
                 return NULL;
 
@@ -184,7 +184,7 @@ void free_mdio_bitbang(struct mii_bus *bus)
         struct mdiobb_ctrl *ctrl = bus->priv;
 
         module_put(ctrl->ops->owner);
-        kfree(bus);
+        mdiobus_free(bus);
 }
 EXPORT_SYMBOL(free_mdio_bitbang);
 
diff --git a/drivers/net/phy/mdio-ofgpio.c b/drivers/net/phy/mdio-ofgpio.c
index 27bd4539d08..2ff97754e57 100644
--- a/drivers/net/phy/mdio-ofgpio.c
+++ b/drivers/net/phy/mdio-ofgpio.c
@@ -122,7 +122,7 @@ static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
 
         new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
         if (!new_bus)
-                goto out_free_priv;
+                goto out_free_bitbang;
 
         new_bus->name = "GPIO Bitbanged MII",
 
@@ -155,9 +155,9 @@ out_free_irqs:
         dev_set_drvdata(&ofdev->dev, NULL);
         kfree(new_bus->irq);
 out_free_bus:
-        kfree(new_bus);
-out_free_priv:
         free_mdio_bitbang(new_bus);
+out_free_bitbang:
+        kfree(bitbang);
 out:
         return ret;
 }
@@ -168,11 +168,10 @@ static int mdio_ofgpio_remove(struct of_device *ofdev)
         struct mdio_gpio_info *bitbang = bus->priv;
 
         mdiobus_unregister(bus);
+        kfree(bus->irq);
         free_mdio_bitbang(bus);
         dev_set_drvdata(&ofdev->dev, NULL);
-        kfree(bus->irq);
         kfree(bitbang);
-        kfree(bus);
 
         return 0;
 }
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index a7211a32bb4..d206691f15d 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -36,6 +36,18 @@
 #include <asm/uaccess.h>
 
 /**
+ * mdiobus_alloc - allocate a mii_bus structure
+ *
+ * Description: called by a bus driver to allocate an mii_bus
+ * structure to fill in.
+ */
+struct mii_bus *mdiobus_alloc(void)
+{
+        return kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+}
+EXPORT_SYMBOL(mdiobus_alloc);
+
+/**
  * mdiobus_register - bring up all the PHYs on a given bus and attach them to bus
  * @bus: target mii_bus
  *
@@ -87,6 +99,18 @@ void mdiobus_unregister(struct mii_bus *bus)
 }
 EXPORT_SYMBOL(mdiobus_unregister);
 
+/**
+ * mdiobus_free - free a struct mii_bus
+ * @bus: mii_bus to free
+ *
+ * This function frees the mii_bus.
+ */
+void mdiobus_free(struct mii_bus *bus)
+{
+        kfree(bus);
+}
+EXPORT_SYMBOL(mdiobus_free);
+
 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr)
 {
         struct phy_device *phydev;
diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c
index d0ee735590b..2615d46e6e5 100644
--- a/drivers/net/sb1250-mac.c
+++ b/drivers/net/sb1250-mac.c
@@ -256,7 +256,7 @@ struct sbmac_softc {
         struct net_device       *sbm_dev;       /* pointer to linux device */
         struct napi_struct      napi;
         struct phy_device       *phy_dev;       /* the associated PHY device */
-        struct mii_bus          mii_bus;        /* the MII bus */
+        struct mii_bus          *mii_bus;       /* the MII bus */
         int                     phy_irq[PHY_MAX_ADDR];
         spinlock_t              sbm_lock;       /* spin lock */
         int                     sbm_devflags;   /* current device flags */
@@ -2348,10 +2348,17 @@ static int sbmac_init(struct platform_device *pldev, long long base)
         /* This is needed for PASS2 for Rx H/W checksum feature */
         sbmac_set_iphdr_offset(sc);
 
+        sc->mii_bus = mdiobus_alloc();
+        if (sc->mii_bus == NULL) {
+                sbmac_uninitctx(sc);
+                return -ENOMEM;
+        }
+
         err = register_netdev(dev);
         if (err) {
                 printk(KERN_ERR "%s.%d: unable to register netdev\n",
                        sbmac_string, idx);
+                mdiobus_free(sc->mii_bus);
                 sbmac_uninitctx(sc);
                 return err;
         }
@@ -2369,17 +2376,17 @@ static int sbmac_init(struct platform_device *pldev, long long base)
         pr_info("%s: SiByte Ethernet at 0x%08Lx, address: %s\n",
                dev->name, base, print_mac(mac, eaddr));
 
-        sc->mii_bus.name = sbmac_mdio_string;
-        snprintf(sc->mii_bus.id, MII_BUS_ID_SIZE, "%x", idx);
-        sc->mii_bus.priv = sc;
-        sc->mii_bus.read = sbmac_mii_read;
-        sc->mii_bus.write = sbmac_mii_write;
-        sc->mii_bus.irq = sc->phy_irq;
+        sc->mii_bus->name = sbmac_mdio_string;
+        snprintf(sc->mii_bus->id, MII_BUS_ID_SIZE, "%x", idx);
+        sc->mii_bus->priv = sc;
+        sc->mii_bus->read = sbmac_mii_read;
+        sc->mii_bus->write = sbmac_mii_write;
+        sc->mii_bus->irq = sc->phy_irq;
         for (i = 0; i < PHY_MAX_ADDR; ++i)
-                sc->mii_bus.irq[i] = SBMAC_PHY_INT;
+                sc->mii_bus->irq[i] = SBMAC_PHY_INT;
 
-        sc->mii_bus.parent = &pldev->dev;
-        dev_set_drvdata(&pldev->dev, &sc->mii_bus);
+        sc->mii_bus->parent = &pldev->dev;
+        dev_set_drvdata(&pldev->dev, sc->mii_bus);
 
         return 0;
 }
@@ -2410,7 +2417,7 @@ static int sbmac_open(struct net_device *dev)
         /*
          * Probe PHY address
          */
-        err = mdiobus_register(&sc->mii_bus);
+        err = mdiobus_register(sc->mii_bus);
         if (err) {
                 printk(KERN_ERR "%s: unable to register MDIO bus\n",
                        dev->name);
@@ -2447,7 +2454,7 @@ static int sbmac_open(struct net_device *dev)
         return 0;
 
 out_unregister:
-        mdiobus_unregister(&sc->mii_bus);
+        mdiobus_unregister(sc->mii_bus);
 
 out_unirq:
         free_irq(dev->irq, dev);
@@ -2463,7 +2470,7 @@ static int sbmac_mii_probe(struct net_device *dev)
         int i;
 
         for (i = 0; i < PHY_MAX_ADDR; i++) {
-                phy_dev = sc->mii_bus.phy_map[i];
+                phy_dev = sc->mii_bus->phy_map[i];
                 if (phy_dev)
                         break;
         }
@@ -2641,7 +2648,7 @@ static int sbmac_close(struct net_device *dev)
         phy_disconnect(sc->phy_dev);
         sc->phy_dev = NULL;
 
-        mdiobus_unregister(&sc->mii_bus);
+        mdiobus_unregister(sc->mii_bus);
 
         free_irq(dev->irq, dev);
 
@@ -2750,6 +2757,7 @@ static int __exit sbmac_remove(struct platform_device *pldev)
 
         unregister_netdev(dev);
         sbmac_uninitctx(sc);
+        mdiobus_free(sc->mii_bus);
         iounmap(sc->sbm_base);
         free_netdev(dev);
 
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c
index 1b3b7b66ffd..b39d1cc1ef0 100644
--- a/drivers/net/sh_eth.c
+++ b/drivers/net/sh_eth.c
@@ -1166,7 +1166,7 @@ out_free_irq:
         kfree(mdp->mii_bus->irq);
 
 out_free_bus:
-        kfree(mdp->mii_bus);
+        free_mdio_bitbang(mdp->mii_bus);
 
 out_free_bitbang:
         kfree(bitbang);
diff --git a/drivers/net/tc35815.c b/drivers/net/tc35815.c
index 1f2b1f2d73a..4980b12b621 100644
--- a/drivers/net/tc35815.c
+++ b/drivers/net/tc35815.c
@@ -424,7 +424,7 @@ struct tc35815_local {
          */
         spinlock_t lock;
 
-        struct mii_bus mii_bus;
+        struct mii_bus *mii_bus;
         struct phy_device *phy_dev;
         int duplex;
         int speed;
@@ -704,13 +704,13 @@ static int tc_mii_probe(struct net_device *dev)
 
         /* find the first phy */
         for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
-                if (lp->mii_bus.phy_map[phy_addr]) {
+                if (lp->mii_bus->phy_map[phy_addr]) {
                         if (phydev) {
                                 printk(KERN_ERR "%s: multiple PHYs found\n",
                                        dev->name);
                                 return -EINVAL;
                         }
-                        phydev = lp->mii_bus.phy_map[phy_addr];
+                        phydev = lp->mii_bus->phy_map[phy_addr];
                         break;
                 }
         }
@@ -762,23 +762,29 @@ static int tc_mii_init(struct net_device *dev)
         int err;
         int i;
 
-        lp->mii_bus.name = "tc35815_mii_bus";
-        lp->mii_bus.read = tc_mdio_read;
-        lp->mii_bus.write = tc_mdio_write;
-        snprintf(lp->mii_bus.id, MII_BUS_ID_SIZE, "%x",
-                 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
-        lp->mii_bus.priv = dev;
-        lp->mii_bus.parent = &lp->pci_dev->dev;
-        lp->mii_bus.irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-        if (!lp->mii_bus.irq) {
+        lp->mii_bus = mdiobus_alloc();
+        if (lp->mii_bus == NULL) {
                 err = -ENOMEM;
                 goto err_out;
         }
 
+        lp->mii_bus->name = "tc35815_mii_bus";
+        lp->mii_bus->read = tc_mdio_read;
+        lp->mii_bus->write = tc_mdio_write;
+        snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%x",
+                 (lp->pci_dev->bus->number << 8) | lp->pci_dev->devfn);
+        lp->mii_bus->priv = dev;
+        lp->mii_bus->parent = &lp->pci_dev->dev;
+        lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
+        if (!lp->mii_bus->irq) {
+                err = -ENOMEM;
+                goto err_out_free_mii_bus;
+        }
+
         for (i = 0; i < PHY_MAX_ADDR; i++)
-                lp->mii_bus.irq[i] = PHY_POLL;
+                lp->mii_bus->irq[i] = PHY_POLL;
 
-        err = mdiobus_register(&lp->mii_bus);
+        err = mdiobus_register(lp->mii_bus);
         if (err)
                 goto err_out_free_mdio_irq;
         err = tc_mii_probe(dev);
@@ -787,9 +793,11 @@ static int tc_mii_init(struct net_device *dev)
         return 0;
 
 err_out_unregister_bus:
-        mdiobus_unregister(&lp->mii_bus);
+        mdiobus_unregister(lp->mii_bus);
 err_out_free_mdio_irq:
-        kfree(lp->mii_bus.irq);
+        kfree(lp->mii_bus->irq);
+err_out_free_mii_bus;
+        mdiobus_free(lp->mii_bus);
 err_out:
         return err;
 }
@@ -961,8 +969,9 @@ static void __devexit tc35815_remove_one(struct pci_dev *pdev)
         struct tc35815_local *lp = netdev_priv(dev);
 
         phy_disconnect(lp->phy_dev);
-        mdiobus_unregister(&lp->mii_bus);
-        kfree(lp->mii_bus.irq);
+        mdiobus_unregister(lp->mii_bus);
+        kfree(lp->mii_bus->irq);
+        mdiobus_free(lp->mii_bus);
         unregister_netdev(dev);
         free_netdev(dev);
         pci_set_drvdata(pdev, NULL);
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 4b8b75bcbde..eb9f8f3638e 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -876,7 +876,7 @@ static void tg3_mdio_config(struct tg3 *tp)
 {
         u32 val;
 
-        if (tp->mdio_bus.phy_map[PHY_ADDR]->interface !=
+        if (tp->mdio_bus->phy_map[PHY_ADDR]->interface !=
             PHY_INTERFACE_MODE_RGMII)
                 return;
 
@@ -920,9 +920,9 @@ static void tg3_mdio_config(struct tg3 *tp)
 static void tg3_mdio_start(struct tg3 *tp)
 {
         if (tp->tg3_flags3 & TG3_FLG3_MDIOBUS_INITED) {
-                mutex_lock(&tp->mdio_bus.mdio_lock);
+                mutex_lock(&tp->mdio_bus->mdio_lock);
                 tp->tg3_flags3 &= ~TG3_FLG3_MDIOBUS_PAUSED;
-                mutex_unlock(&tp->mdio_bus.mdio_lock);
+                mutex_unlock(&tp->mdio_bus->mdio_lock);
         }
 
         tp->mi_mode &= ~MAC_MI_MODE_AUTO_POLL;
@@ -936,9 +936,9 @@ static void tg3_mdio_start(struct tg3 *tp)
 static void tg3_mdio_stop(struct tg3 *tp)
 {
         if (tp->tg3_flags3 & TG3_FLG3_MDIOBUS_INITED) {
-                mutex_lock(&tp->mdio_bus.mdio_lock);
+                mutex_lock(&tp->mdio_bus->mdio_lock);
                 tp->tg3_flags3 |= TG3_FLG3_MDIOBUS_PAUSED;
-                mutex_unlock(&tp->mdio_bus.mdio_lock);
+                mutex_unlock(&tp->mdio_bus->mdio_lock);
         }
 }
 
@@ -947,7 +947,6 @@ static int tg3_mdio_init(struct tg3 *tp)
         int i;
         u32 reg;
         struct phy_device *phydev;
-        struct mii_bus *mdio_bus = &tp->mdio_bus;
 
         tg3_mdio_start(tp);
 
@@ -955,21 +954,23 @@ static int tg3_mdio_init(struct tg3 *tp)
             (tp->tg3_flags3 & TG3_FLG3_MDIOBUS_INITED))
                 return 0;
 
-        memset(mdio_bus, 0, sizeof(*mdio_bus));
+        tp->mdio_bus = mdiobus_alloc();
+        if (tp->mdio_bus == NULL)
+                return -ENOMEM;
 
-        mdio_bus->name     = "tg3 mdio bus";
-        snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%x",
+        tp->mdio_bus->name     = "tg3 mdio bus";
+        snprintf(tp->mdio_bus->id, MII_BUS_ID_SIZE, "%x",
                  (tp->pdev->bus->number << 8) | tp->pdev->devfn);
-        mdio_bus->priv     = tp;
-        mdio_bus->parent   = &tp->pdev->dev;
-        mdio_bus->read     = &tg3_mdio_read;
-        mdio_bus->write    = &tg3_mdio_write;
-        mdio_bus->reset    = &tg3_mdio_reset;
-        mdio_bus->phy_mask = ~(1 << PHY_ADDR);
-        mdio_bus->irq      = &tp->mdio_irq[0];
+        tp->mdio_bus->priv     = tp;
+        tp->mdio_bus->parent   = &tp->pdev->dev;
+        tp->mdio_bus->read     = &tg3_mdio_read;
+        tp->mdio_bus->write    = &tg3_mdio_write;
+        tp->mdio_bus->reset    = &tg3_mdio_reset;
+        tp->mdio_bus->phy_mask = ~(1 << PHY_ADDR);
+        tp->mdio_bus->irq      = &tp->mdio_irq[0];
 
         for (i = 0; i < PHY_MAX_ADDR; i++)
-                mdio_bus->irq[i] = PHY_POLL;
+                tp->mdio_bus->irq[i] = PHY_POLL;
 
         /* The bus registration will look for all the PHYs on the mdio bus.
          * Unfortunately, it does not ensure the PHY is powered up before
@@ -979,7 +980,7 @@ static int tg3_mdio_init(struct tg3 *tp)
         if (tg3_readphy(tp, MII_BMCR, &reg) || (reg & BMCR_PDOWN))
                 tg3_bmcr_reset(tp);
 
-        i = mdiobus_register(mdio_bus);
+        i = mdiobus_register(tp->mdio_bus);
         if (i) {
                 printk(KERN_WARNING "%s: mdiobus_reg failed (0x%x)\n",
                         tp->dev->name, i);
@@ -988,7 +989,7 @@ static int tg3_mdio_init(struct tg3 *tp)
 
         tp->tg3_flags3 |= TG3_FLG3_MDIOBUS_INITED;
 
-        phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+        phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
         switch (phydev->phy_id) {
         case TG3_PHY_ID_BCM50610:
@@ -1014,7 +1015,8 @@ static void tg3_mdio_fini(struct tg3 *tp)
 {
         if (tp->tg3_flags3 & TG3_FLG3_MDIOBUS_INITED) {
                 tp->tg3_flags3 &= ~TG3_FLG3_MDIOBUS_INITED;
-                mdiobus_unregister(&tp->mdio_bus);
+                mdiobus_unregister(tp->mdio_bus);
+                mdiobus_free(tp->mdio_bus);
                 tp->tg3_flags3 &= ~TG3_FLG3_MDIOBUS_PAUSED;
         }
 }
@@ -1220,7 +1222,7 @@ static void tg3_setup_flow_control(struct tg3 *tp, u32 lcladv, u32 rmtadv)
         u32 old_tx_mode = tp->tx_mode;
 
         if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB)
-                autoneg = tp->mdio_bus.phy_map[PHY_ADDR]->autoneg;
+                autoneg = tp->mdio_bus->phy_map[PHY_ADDR]->autoneg;
         else
                 autoneg = tp->link_config.autoneg;
 
@@ -1257,7 +1259,7 @@ static void tg3_adjust_link(struct net_device *dev)
         u8 oldflowctrl, linkmesg = 0;
         u32 mac_mode, lcl_adv, rmt_adv;
         struct tg3 *tp = netdev_priv(dev);
-        struct phy_device *phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+        struct phy_device *phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
         spin_lock(&tp->lock);
 
@@ -1334,7 +1336,7 @@ static int tg3_phy_init(struct tg3 *tp)
         /* Bring the PHY back to a known state. */
         tg3_bmcr_reset(tp);
 
-        phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+        phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
         /* Attach the MAC to the PHY. */
         phydev = phy_connect(tp->dev, phydev->dev.bus_id, tg3_adjust_link,
@@ -1367,7 +1369,7 @@ static void tg3_phy_start(struct tg3 *tp)
         if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                 return;
 
-        phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+        phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
         if (tp->link_config.phy_is_low_power) {
                 tp->link_config.phy_is_low_power = 0;
@@ -1387,13 +1389,13 @@ static void tg3_phy_stop(struct tg3 *tp)
         if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                 return;
 
-        phy_stop(tp->mdio_bus.phy_map[PHY_ADDR]);
+        phy_stop(tp->mdio_bus->phy_map[PHY_ADDR]);
 }
 
 static void tg3_phy_fini(struct tg3 *tp)
 {
         if (tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED) {
-                phy_disconnect(tp->mdio_bus.phy_map[PHY_ADDR]);
+                phy_disconnect(tp->mdio_bus->phy_map[PHY_ADDR]);
                 tp->tg3_flags3 &= ~TG3_FLG3_PHY_CONNECTED;
         }
 }
@@ -2049,7 +2051,7 @@ static int tg3_set_power_state(struct tg3 *tp, pci_power_t state)
                         struct phy_device *phydev;
                         u32 advertising;
 
-                        phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+                        phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
                         tp->link_config.phy_is_low_power = 1;
 
@@ -8954,7 +8956,7 @@ static int tg3_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
         if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB) {
                 if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                         return -EAGAIN;
-                return phy_ethtool_gset(tp->mdio_bus.phy_map[PHY_ADDR], cmd);
+                return phy_ethtool_gset(tp->mdio_bus->phy_map[PHY_ADDR], cmd);
         }
 
         cmd->supported = (SUPPORTED_Autoneg);
@@ -8995,7 +8997,7 @@ static int tg3_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
         if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB) {
                 if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                         return -EAGAIN;
-                return phy_ethtool_sset(tp->mdio_bus.phy_map[PHY_ADDR], cmd);
+                return phy_ethtool_sset(tp->mdio_bus->phy_map[PHY_ADDR], cmd);
         }
 
         if (tp->tg3_flags2 & TG3_FLG2_ANY_SERDES) {
@@ -9143,7 +9145,7 @@ static int tg3_nway_reset(struct net_device *dev)
         if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB) {
                 if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                         return -EAGAIN;
-                r = phy_start_aneg(tp->mdio_bus.phy_map[PHY_ADDR]);
+                r = phy_start_aneg(tp->mdio_bus->phy_map[PHY_ADDR]);
         } else {
                 u32 bmcr;
 
@@ -9260,7 +9262,7 @@ static int tg3_set_pauseparam(struct net_device *dev, struct ethtool_pauseparam
                         u32 newadv;
                         struct phy_device *phydev;
 
-                        phydev = tp->mdio_bus.phy_map[PHY_ADDR];
+                        phydev = tp->mdio_bus->phy_map[PHY_ADDR];
 
                         if (epause->rx_pause) {
                                 if (epause->tx_pause)
@@ -10242,7 +10244,7 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
         if (tp->tg3_flags3 & TG3_FLG3_USE_PHYLIB) {
                 if (!(tp->tg3_flags3 & TG3_FLG3_PHY_CONNECTED))
                         return -EAGAIN;
-                return phy_mii_ioctl(tp->mdio_bus.phy_map[PHY_ADDR], data, cmd);
+                return phy_mii_ioctl(tp->mdio_bus->phy_map[PHY_ADDR], data, cmd);
         }
 
         switch(cmd) {
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 6c7b5e303db..be252abe898 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2556,7 +2556,7 @@ struct tg3 {
         int                             msi_cap;
         int                             pcix_cap;
 
-        struct mii_bus                  mdio_bus;
+        struct mii_bus                  *mdio_bus;
         int                             mdio_irq[PHY_MAX_ADDR];
 
         /* PHY info */
diff --git a/drivers/net/ucc_geth_mii.c b/drivers/net/ucc_geth_mii.c
index 75b72fe1f23..c001d261366 100644
--- a/drivers/net/ucc_geth_mii.c
+++ b/drivers/net/ucc_geth_mii.c
@@ -141,8 +141,7 @@ static int uec_mdio_probe(struct of_device *ofdev, const struct of_device_id *ma
         struct resource res;
         int k, err = 0;
 
-        new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
-
+        new_bus = mdiobus_alloc();
         if (NULL == new_bus)
                 return -ENOMEM;
 
@@ -235,7 +234,7 @@ bus_register_fail:
 ioremap_fail:
         kfree(new_bus->irq);
 reg_map_fail:
-        kfree(new_bus);
+        mdiobus_free(new_bus);
 
         return err;
 }
@@ -251,7 +250,7 @@ static int uec_mdio_remove(struct of_device *ofdev)
 
         iounmap((void __iomem *)bus->priv);
         bus->priv = NULL;
-        kfree(bus);
+        mdiobus_free(bus);
 
         return 0;
 }
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 87499bdedc6..ca4a83c4c53 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -408,8 +408,10 @@ void phy_start(struct phy_device *phydev);
 void phy_stop(struct phy_device *phydev);
 int phy_start_aneg(struct phy_device *phydev);
 
+struct mii_bus *mdiobus_alloc(void);
 int mdiobus_register(struct mii_bus *bus);
 void mdiobus_unregister(struct mii_bus *bus);
+void mdiobus_free(struct mii_bus *bus);
 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
 
 void phy_sanitize_settings(struct phy_device *phydev);