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);
 # 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);
 
        /* 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
                 * 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... */
        *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;
        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);
                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]);
 
        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                      */
 
 
        /* 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... */
        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;
        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:
 
        platform_set_drvdata(pdev, NULL);
 
-       mdiobus_unregister(&lp->mii_bus);
+       mdiobus_unregister(lp->mii_bus);
+       mdiobus_free(lp->mii_bus);
 
        unregister_netdev(ndev);
 
 
        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);
 
 
 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)
 {
        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;
        }
        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))
        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
        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();
                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;
 
        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;
 }
 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);
 
        int err;
        int i;
 
-       bus = kzalloc(sizeof(*bus), GFP_KERNEL);
+       bus = mdiobus_alloc();
        if (bus == NULL)
                return -ENOMEM;
        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
                        irq_dispose_mapping(bus->irq[i]);
        kfree(bus->irq);
        kfree(priv);
-       kfree(bus);
+       mdiobus_free(bus);
 
        return err;
 }
                        irq_dispose_mapping(bus->irq[i]);
        kfree(priv);
        kfree(bus->irq);
-       kfree(bus);
+       mdiobus_free(bus);
 
        return 0;
 }
 
 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;
 }
        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;
 }
 
        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;
 
 out_fec:
        kfree(fec);
 out_mii:
-       kfree(new_bus);
+       mdiobus_free(new_bus);
 out:
        return ret;
 }
        kfree(bus->irq);
        iounmap(fec->fecp);
        kfree(fec);
-       kfree(bus);
+       mdiobus_free(bus);
 
        return 0;
 }
 
        if (NULL == dev)
                return -EINVAL;
 
-       new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
-
+       new_bus = mdiobus_alloc();
        if (NULL == new_bus)
                return -ENOMEM;
 
 bus_register_fail:
        iounmap(regs);
 reg_map_fail:
-       kfree(new_bus);
+       mdiobus_free(new_bus);
 
        return err;
 }
 
        iounmap((void __iomem *)bus->priv);
        bus->priv = NULL;
-       kfree(bus);
+       mdiobus_free(bus);
 
        return 0;
 }
 
 
        /* 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;
                }
        }
        /* 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) {
        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;
 }
                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);
 
 
        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;
 
        /*
         * 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
         * 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);
 
        return 0;
 
+out_free_mii_bus:
+       mdiobus_free(msp->smi_bus);
 out_unmap:
        iounmap(msp->base);
 out_free:
        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);
 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;
 
 
 struct fixed_mdio_bus {
        int irqs[PHY_MAX_ADDR];
-       struct mii_bus mii_bus;
+       struct mii_bus *mii_bus;
        struct list_head phys;
 };
 
                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:
        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) {
 
 {
        struct mii_bus *bus;
 
-       bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
+       bus = mdiobus_alloc();
        if (!bus)
                return NULL;
 
        struct mdiobb_ctrl *ctrl = bus->priv;
 
        module_put(ctrl->ops->owner);
-       kfree(bus);
+       mdiobus_free(bus);
 }
 EXPORT_SYMBOL(free_mdio_bitbang);
 
 
 
        new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
        if (!new_bus)
-               goto out_free_priv;
+               goto out_free_bitbang;
 
        new_bus->name = "GPIO Bitbanged MII",
 
        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;
 }
        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;
 }
 
 #include <asm/irq.h>
 #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
 }
 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;
 
        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 */
        /* 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;
        }
        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;
 }
        /*
         * 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);
        return 0;
 
 out_unregister:
-       mdiobus_unregister(&sc->mii_bus);
+       mdiobus_unregister(sc->mii_bus);
 
 out_unirq:
        free_irq(dev->irq, 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;
        }
        phy_disconnect(sc->phy_dev);
        sc->phy_dev = NULL;
 
-       mdiobus_unregister(&sc->mii_bus);
+       mdiobus_unregister(sc->mii_bus);
 
        free_irq(dev->irq, dev);
 
 
        unregister_netdev(dev);
        sbmac_uninitctx(sc);
+       mdiobus_free(sc->mii_bus);
        iounmap(sc->sbm_base);
        free_netdev(dev);
 
 
        kfree(mdp->mii_bus->irq);
 
 out_free_bus:
-       kfree(mdp->mii_bus);
+       free_mdio_bitbang(mdp->mii_bus);
 
 out_free_bitbang:
        kfree(bitbang);
 
         */
        spinlock_t lock;
 
-       struct mii_bus mii_bus;
+       struct mii_bus *mii_bus;
        struct phy_device *phy_dev;
        int duplex;
        int speed;
 
        /* 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;
                }
        }
        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);
        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;
 }
        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);
 
 {
        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;
 
 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;
 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);
        }
 }
 
        int i;
        u32 reg;
        struct phy_device *phydev;
-       struct mii_bus *mdio_bus = &tp->mdio_bus;
 
        tg3_mdio_start(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
        if (tg3_readphy(tp, MII_BMCR, ®) || (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);
 
        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:
 {
        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;
        }
 }
        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;
 
        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);
 
        /* 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,
        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;
        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;
        }
 }
                        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;
 
        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);
        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) {
        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;
 
                        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)
        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) {
 
        int                             msi_cap;
        int                             pcix_cap;
 
-       struct mii_bus                  mdio_bus;
+       struct mii_bus                  *mdio_bus;
        int                             mdio_irq[PHY_MAX_ADDR];
 
        /* PHY info */
 
        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;
 
 ioremap_fail:
        kfree(new_bus->irq);
 reg_map_fail:
-       kfree(new_bus);
+       mdiobus_free(new_bus);
 
        return err;
 }
 
        iounmap((void __iomem *)bus->priv);
        bus->priv = NULL;
-       kfree(bus);
+       mdiobus_free(bus);
 
        return 0;
 }
 
 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);