mdio: Move allocation of interrupts into core

Have mdio_alloc() create the array of interrupt numbers, and
initialize it to POLLING. This is what most MDIO drivers want, so
allowing code to be removed from the drivers.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

51 files changed, 44 insertions, 381 deletions

diff --git a/drivers/net/ethernet/8390/ax88796.c b/drivers/net/ethernet/8390/ax88796.c
index 90b540a..c89b9ae 100644
--- a/drivers/net/ethernet/8390/ax88796.c
+++ b/drivers/net/ethernet/8390/ax88796.c
@@ -627,7 +627,7 @@ static int ax_mii_init(struct net_device *dev)
 	struct platform_device *pdev = to_platform_device(dev->dev.parent);
 	struct ei_device *ei_local = netdev_priv(dev);
 	struct ax_device *ax = to_ax_dev(dev);
-	int err, i;
+	int err;
 
 	ax->bb_ctrl.ops = &bb_ops;
 	ax->addr_memr = ei_local->mem + AX_MEMR;
@@ -642,23 +642,12 @@ static int ax_mii_init(struct net_device *dev)
 	snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		pdev->name, pdev->id);
 
-	ax->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!ax->mii_bus->irq) {
-		err = -ENOMEM;
-		goto out_free_mdio_bitbang;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		ax->mii_bus->irq[i] = PHY_POLL;
-
 	err = mdiobus_register(ax->mii_bus);
 	if (err)
-		goto out_free_irq;
+		goto out_free_mdio_bitbang;
 
 	return 0;
 
- out_free_irq:
-	kfree(ax->mii_bus->irq);
  out_free_mdio_bitbang:
 	free_mdio_bitbang(ax->mii_bus);
  out:
diff --git a/drivers/net/ethernet/adi/bfin_mac.c b/drivers/net/ethernet/adi/bfin_mac.c
index ed5c78c..6286274 100644
--- a/drivers/net/ethernet/adi/bfin_mac.c
+++ b/drivers/net/ethernet/adi/bfin_mac.c
@@ -1838,12 +1838,6 @@ static int bfin_mii_bus_probe(struct platform_device *pdev)
 
 	snprintf(miibus->id, MII_BUS_ID_SIZE, "%s-%x",
 		pdev->name, pdev->id);
-	miibus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-	if (!miibus->irq)
-		goto out_err_irq_alloc;
-
-	for (i = rc; i < PHY_MAX_ADDR; ++i)
-		miibus->irq[i] = PHY_POLL;
 
 	rc = clamp(mii_bus_pd->phydev_number, 0, PHY_MAX_ADDR);
 	if (rc != mii_bus_pd->phydev_number)
@@ -1862,14 +1856,12 @@ static int bfin_mii_bus_probe(struct platform_device *pdev)
 	rc = mdiobus_register(miibus);
 	if (rc) {
 		dev_err(&pdev->dev, "Cannot register MDIO bus!\n");
-		goto out_err_mdiobus_register;
+		goto out_err_alloc;
 	}
 
 	platform_set_drvdata(pdev, miibus);
 	return 0;
 
-out_err_mdiobus_register:
-	kfree(miibus->irq);
 out_err_irq_alloc:
 	mdiobus_free(miibus);
 out_err_alloc:
@@ -1885,7 +1877,6 @@ static int bfin_mii_bus_remove(struct platform_device *pdev)
 		dev_get_platdata(&pdev->dev);
 
 	mdiobus_unregister(miibus);
-	kfree(miibus->irq);
 	mdiobus_free(miibus);
 	peripheral_free_list(mii_bus_pd->mac_peripherals);
 
diff --git a/drivers/net/ethernet/aeroflex/greth.c b/drivers/net/ethernet/aeroflex/greth.c
index 20bf55d..b873531 100644
--- a/drivers/net/ethernet/aeroflex/greth.c
+++ b/drivers/net/ethernet/aeroflex/greth.c
@@ -1337,11 +1337,6 @@ static int greth_mdio_init(struct greth_private *greth)
 	greth->mdio->write = greth_mdio_write;
 	greth->mdio->priv = greth;
 
-	greth->mdio->irq = greth->mdio_irqs;
-
-	for (phy = 0; phy < PHY_MAX_ADDR; phy++)
-		greth->mdio->irq[phy] = PHY_POLL;
-
 	ret = mdiobus_register(greth->mdio);
 	if (ret) {
 		goto error;
diff --git a/drivers/net/ethernet/aeroflex/greth.h b/drivers/net/ethernet/aeroflex/greth.h
index ae16ac9..92dd918 100644
--- a/drivers/net/ethernet/aeroflex/greth.h
+++ b/drivers/net/ethernet/aeroflex/greth.h
@@ -125,7 +125,6 @@ struct greth_private {
 
 	struct phy_device *phy;
 	struct mii_bus *mdio;
-	int mdio_irqs[PHY_MAX_ADDR];
 	unsigned int link;
 	unsigned int speed;
 	unsigned int duplex;
diff --git a/drivers/net/ethernet/agere/et131x.c b/drivers/net/ethernet/agere/et131x.c
index 825da3a..f29d45e 100644
--- a/drivers/net/ethernet/agere/et131x.c
+++ b/drivers/net/ethernet/agere/et131x.c
@@ -3325,7 +3325,6 @@ static void et131x_pci_remove(struct pci_dev *pdev)
 	netif_napi_del(&adapter->napi);
 	phy_disconnect(adapter->phydev);
 	mdiobus_unregister(adapter->mii_bus);
-	kfree(adapter->mii_bus->irq);
 	mdiobus_free(adapter->mii_bus);
 
 	et131x_adapter_memory_free(adapter);
@@ -3944,7 +3943,6 @@ static int et131x_pci_setup(struct pci_dev *pdev,
 	struct net_device *netdev;
 	struct et131x_adapter *adapter;
 	int rc;
-	int ii;
 
 	rc = pci_enable_device(pdev);
 	if (rc < 0) {
@@ -4034,18 +4032,11 @@ static int et131x_pci_setup(struct pci_dev *pdev,
 	adapter->mii_bus->priv = netdev;
 	adapter->mii_bus->read = et131x_mdio_read;
 	adapter->mii_bus->write = et131x_mdio_write;
-	adapter->mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int),
-					      GFP_KERNEL);
-	if (!adapter->mii_bus->irq)
-		goto err_mdio_free;
-
-	for (ii = 0; ii < PHY_MAX_ADDR; ii++)
-		adapter->mii_bus->irq[ii] = PHY_POLL;
 
 	rc = mdiobus_register(adapter->mii_bus);
 	if (rc < 0) {
 		dev_err(&pdev->dev, "failed to register MII bus\n");
-		goto err_mdio_free_irq;
+		goto err_mdio_free;
 	}
 
 	rc = et131x_mii_probe(netdev);
@@ -4085,8 +4076,6 @@ err_phy_disconnect:
 	phy_disconnect(adapter->phydev);
 err_mdio_unregister:
 	mdiobus_unregister(adapter->mii_bus);
-err_mdio_free_irq:
-	kfree(adapter->mii_bus->irq);
 err_mdio_free:
 	mdiobus_free(adapter->mii_bus);
 err_mem_free:
diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
index fe64482..10d51e8 100644
--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -131,7 +131,6 @@ static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
 {
 	struct altera_tse_private *priv = netdev_priv(dev);
 	int ret;
-	int i;
 	struct device_node *mdio_node = NULL;
 	struct mii_bus *mdio = NULL;
 	struct device_node *child_node = NULL;
@@ -161,14 +160,6 @@ static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
 	mdio->write = &altera_tse_mdio_write;
 	snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id);
 
-	mdio->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
-	if (mdio->irq == NULL) {
-		ret = -ENOMEM;
-		goto out_free_mdio;
-	}
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		mdio->irq[i] = PHY_POLL;
-
 	mdio->priv = dev;
 	mdio->parent = priv->device;
 
@@ -176,7 +167,7 @@ static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
 	if (ret != 0) {
 		netdev_err(dev, "Cannot register MDIO bus %s\n",
 			   mdio->id);
-		goto out_free_mdio_irq;
+		goto out_free_mdio;
 	}
 
 	if (netif_msg_drv(priv))
@@ -184,8 +175,6 @@ static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
 
 	priv->mdio = mdio;
 	return 0;
-out_free_mdio_irq:
-	kfree(mdio->irq);
 out_free_mdio:
 	mdiobus_free(mdio);
 	mdio = NULL;
diff --git a/drivers/net/ethernet/amd/au1000_eth.c b/drivers/net/ethernet/amd/au1000_eth.c
index 114618d..982b581 100644
--- a/drivers/net/ethernet/amd/au1000_eth.c
+++ b/drivers/net/ethernet/amd/au1000_eth.c
@@ -1291,14 +1291,7 @@ static int au1000_probe(struct platform_device *pdev)
 	aup->mii_bus->name = "au1000_eth_mii";
 	snprintf(aup->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		pdev->name, aup->mac_id);
-	aup->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-	if (aup->mii_bus->irq == NULL) {
-		err = -ENOMEM;
-		goto err_out;
-	}
 
-	for (i = 0; i < PHY_MAX_ADDR; ++i)
-		aup->mii_bus->irq[i] = PHY_POLL;
 	/* if known, set corresponding PHY IRQs */
 	if (aup->phy_static_config)
 		if (aup->phy_irq && aup->phy_busid == aup->mac_id)
diff --git a/drivers/net/ethernet/broadcom/b44.c b/drivers/net/ethernet/broadcom/b44.c
index e7d9308..4d08bc0 100644
--- a/drivers/net/ethernet/broadcom/b44.c
+++ b/drivers/net/ethernet/broadcom/b44.c
@@ -2263,21 +2263,13 @@ static int b44_register_phy_one(struct b44 *bp)
 	mii_bus->parent = sdev->dev;
 	mii_bus->phy_mask = ~(1 << bp->phy_addr);
 	snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%x", instance);
-	mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!mii_bus->irq) {
-		dev_err(sdev->dev, "mii_bus irq allocation failed\n");
-		err = -ENOMEM;
-		goto err_out_mdiobus;
-	}
-
-	memset(mii_bus->irq, PHY_POLL, sizeof(int) * PHY_MAX_ADDR);
 
 	bp->mii_bus = mii_bus;
 
 	err = mdiobus_register(mii_bus);
 	if (err) {
 		dev_err(sdev->dev, "failed to register MII bus\n");
-		goto err_out_mdiobus_irq;
+		goto err_out_mdiobus;
 	}
 
 	if (!bp->mii_bus->phy_map[bp->phy_addr] &&
@@ -2322,9 +2314,6 @@ static int b44_register_phy_one(struct b44 *bp)
 err_out_mdiobus_unregister:
 	mdiobus_unregister(mii_bus);
 
-err_out_mdiobus_irq:
-	kfree(mii_bus->irq);
-
 err_out_mdiobus:
 	mdiobus_free(mii_bus);
 
@@ -2338,7 +2327,6 @@ static void b44_unregister_phy_one(struct b44 *bp)
 
 	phy_disconnect(bp->phydev);
 	mdiobus_unregister(mii_bus);
-	kfree(mii_bus->irq);
 	mdiobus_free(mii_bus);
 }
 
diff --git a/drivers/net/ethernet/broadcom/bcm63xx_enet.c b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
index 55f31fa..87c6b5b 100644
--- a/drivers/net/ethernet/broadcom/bcm63xx_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm63xx_enet.c
@@ -1848,17 +1848,8 @@ static int bcm_enet_probe(struct platform_device *pdev)
 		 * if a slave is not present on hw */
 		bus->phy_mask = ~(1 << priv->phy_id);
 
-		bus->irq = devm_kzalloc(&pdev->dev, sizeof(int) * PHY_MAX_ADDR,
-					GFP_KERNEL);
-		if (!bus->irq) {
-			ret = -ENOMEM;
-			goto out_free_mdio;
-		}
-
 		if (priv->has_phy_interrupt)
 			bus->irq[priv->phy_id] = priv->phy_interrupt;
-		else
-			bus->irq[priv->phy_id] = PHY_POLL;
 
 		ret = mdiobus_register(bus);
 		if (ret) {
diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 28f7610..c7798d3 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1471,7 +1471,7 @@ static int bgmac_mii_register(struct bgmac *bgmac)
 	struct mii_bus *mii_bus;
 	struct phy_device *phy_dev;
 	char bus_id[MII_BUS_ID_SIZE + 3];
-	int i, err = 0;
+	int err = 0;
 
 	if (ci->id == BCMA_CHIP_ID_BCM4707 ||
 	    ci->id == BCMA_CHIP_ID_BCM53018)
@@ -1490,18 +1490,10 @@ static int bgmac_mii_register(struct bgmac *bgmac)
 	mii_bus->parent = &bgmac->core->dev;
 	mii_bus->phy_mask = ~(1 << bgmac->phyaddr);
 
-	mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
-	if (!mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_free_bus;
-	}
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		mii_bus->irq[i] = PHY_POLL;
-
 	err = mdiobus_register(mii_bus);
 	if (err) {
 		bgmac_err(bgmac, "Registration of mii bus failed\n");
-		goto err_free_irq;
+		goto err_free_bus;
 	}
 
 	bgmac->mii_bus = mii_bus;
@@ -1522,8 +1514,6 @@ static int bgmac_mii_register(struct bgmac *bgmac)
 
 err_unregister_bus:
 	mdiobus_unregister(mii_bus);
-err_free_irq:
-	kfree(mii_bus->irq);
 err_free_bus:
 	mdiobus_free(mii_bus);
 	return err;
@@ -1534,7 +1524,6 @@ static void bgmac_mii_unregister(struct bgmac *bgmac)
 	struct mii_bus *mii_bus = bgmac->mii_bus;
 
 	mdiobus_unregister(mii_bus);
-	kfree(mii_bus->irq);
 	mdiobus_free(mii_bus);
 }
 
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 8bdfe53..4523acd 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -402,8 +402,6 @@ int bcmgenet_mii_probe(struct net_device *dev)
 	 */
 	if (priv->internal_phy)
 		priv->mii_bus->irq[phydev->addr] = PHY_IGNORE_INTERRUPT;
-	else
-		priv->mii_bus->irq[phydev->addr] = PHY_POLL;
 
 	return 0;
 }
@@ -477,12 +475,6 @@ static int bcmgenet_mii_alloc(struct bcmgenet_priv *priv)
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d",
 		 priv->pdev->name, priv->pdev->id);
 
-	bus->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
-	if (!bus->irq) {
-		mdiobus_free(priv->mii_bus);
-		return -ENOMEM;
-	}
-
 	return 0;
 }
 
@@ -648,7 +640,6 @@ int bcmgenet_mii_init(struct net_device *dev)
 out:
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
-	kfree(priv->mii_bus->irq);
 	mdiobus_free(priv->mii_bus);
 	return ret;
 }
@@ -659,6 +650,5 @@ void bcmgenet_mii_exit(struct net_device *dev)
 
 	of_node_put(priv->phy_dn);
 	mdiobus_unregister(priv->mii_bus);
-	kfree(priv->mii_bus->irq);
 	mdiobus_free(priv->mii_bus);
 }
diff --git a/drivers/net/ethernet/broadcom/sb1250-mac.c b/drivers/net/ethernet/broadcom/sb1250-mac.c
index 2470c60..68a3637 100644
--- a/drivers/net/ethernet/broadcom/sb1250-mac.c
+++ b/drivers/net/ethernet/broadcom/sb1250-mac.c
@@ -238,7 +238,6 @@ struct sbmac_softc {
 	struct napi_struct	napi;
 	struct phy_device	*phy_dev;	/* the associated PHY device */
 	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 */
 
@@ -2250,9 +2249,6 @@ static int sbmac_init(struct platform_device *pldev, long long base)
 	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->parent = &pldev->dev;
 	/*
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index 07c0675..04e7d0d0 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -1538,10 +1538,6 @@ static int tg3_mdio_init(struct tg3 *tp)
 	tp->mdio_bus->read     = &tg3_mdio_read;
 	tp->mdio_bus->write    = &tg3_mdio_write;
 	tp->mdio_bus->phy_mask = ~(1 << tp->phy_addr);
-	tp->mdio_bus->irq      = &tp->mdio_irq[0];
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		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
diff --git a/drivers/net/ethernet/broadcom/tg3.h b/drivers/net/ethernet/broadcom/tg3.h
index 31c9f82..3b5e98e 100644
--- a/drivers/net/ethernet/broadcom/tg3.h
+++ b/drivers/net/ethernet/broadcom/tg3.h
@@ -3254,7 +3254,6 @@ struct tg3 {
 	int				pcie_readrq;
 
 	struct mii_bus			*mdio_bus;
-	int				mdio_irq[PHY_MAX_ADDR];
 	int				old_link;
 
 	u8				phy_addr;
diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
index 98df33b..eb13974 100644
--- a/drivers/net/ethernet/cadence/macb.c
+++ b/drivers/net/ethernet/cadence/macb.c
@@ -441,12 +441,6 @@ static int macb_mii_init(struct macb *bp)
 	bp->mii_bus->parent = &bp->dev->dev;
 	pdata = dev_get_platdata(&bp->pdev->dev);
 
-	bp->mii_bus->irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL);
-	if (!bp->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
 	dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
 
 	np = bp->pdev->dev.of_node;
@@ -471,9 +465,6 @@ static int macb_mii_init(struct macb *bp)
 				goto err_out_unregister_bus;
 		}
 	} else {
-		for (i = 0; i < PHY_MAX_ADDR; i++)
-			bp->mii_bus->irq[i] = PHY_POLL;
-
 		if (pdata)
 			bp->mii_bus->phy_mask = pdata->phy_mask;
 
@@ -481,7 +472,7 @@ static int macb_mii_init(struct macb *bp)
 	}
 
 	if (err)
-		goto err_out_free_mdio_irq;
+		goto err_out_free_mdiobus;
 
 	err = macb_mii_probe(bp->dev);
 	if (err)
@@ -491,8 +482,6 @@ static int macb_mii_init(struct macb *bp)
 
 err_out_unregister_bus:
 	mdiobus_unregister(bp->mii_bus);
-err_out_free_mdio_irq:
-	kfree(bp->mii_bus->irq);
 err_out_free_mdiobus:
 	mdiobus_free(bp->mii_bus);
 err_out:
@@ -2980,7 +2969,6 @@ static int macb_remove(struct platform_device *pdev)
 		if (bp->phy_dev)
 			phy_disconnect(bp->phy_dev);
 		mdiobus_unregister(bp->mii_bus);
-		kfree(bp->mii_bus->irq);
 		mdiobus_free(bp->mii_bus);
 
 		/* Shutdown the PHY if there is a GPIO reset */
diff --git a/drivers/net/ethernet/dnet.c b/drivers/net/ethernet/dnet.c
index 6557460..b69a9ea 100644
--- a/drivers/net/ethernet/dnet.c
+++ b/drivers/net/ethernet/dnet.c
@@ -302,7 +302,7 @@ static int dnet_mii_probe(struct net_device *dev)
 
 static int dnet_mii_init(struct dnet *bp)
 {
-	int err, i;
+	int err;
 
 	bp->mii_bus = mdiobus_alloc();
 	if (bp->mii_bus == NULL)
@@ -317,16 +317,6 @@ static int dnet_mii_init(struct dnet *bp)
 
 	bp->mii_bus->priv = bp;
 
-	bp->mii_bus->irq = devm_kmalloc(&bp->pdev->dev,
-					sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!bp->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		bp->mii_bus->irq[i] = PHY_POLL;
-
 	if (mdiobus_register(bp->mii_bus)) {
 		err = -ENXIO;
 		goto err_out;
diff --git a/drivers/net/ethernet/ethoc.c b/drivers/net/ethernet/ethoc.c
index ff66549..c028b29 100644
--- a/drivers/net/ethernet/ethoc.c
+++ b/drivers/net/ethernet/ethoc.c
@@ -1015,7 +1015,6 @@ static int ethoc_probe(struct platform_device *pdev)
 	struct resource *mmio = NULL;
 	struct resource *mem = NULL;
 	struct ethoc *priv = NULL;
-	unsigned int phy;
 	int num_bd;
 	int ret = 0;
 	bool random_mac = false;
@@ -1206,19 +1205,10 @@ static int ethoc_probe(struct platform_device *pdev)
 	priv->mdio->write = ethoc_mdio_write;
 	priv->mdio->priv = priv;
 
-	priv->mdio->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!priv->mdio->irq) {
-		ret = -ENOMEM;
-		goto free_mdio;
-	}
-
-	for (phy = 0; phy < PHY_MAX_ADDR; phy++)
-		priv->mdio->irq[phy] = PHY_POLL;
-
 	ret = mdiobus_register(priv->mdio);
 	if (ret) {
 		dev_err(&netdev->dev, "failed to register MDIO bus\n");
-		goto free_mdio;
+		goto free;
 	}
 
 	ret = ethoc_mdio_probe(netdev);
@@ -1250,8 +1240,6 @@ error2:
 	netif_napi_del(&priv->napi);
 error:
 	mdiobus_unregister(priv->mdio);
-free_mdio:
-	kfree(priv->mdio->irq);
 	mdiobus_free(priv->mdio);
 free:
 	if (priv->clk)
diff --git a/drivers/net/ethernet/faraday/ftgmac100.c b/drivers/net/ethernet/faraday/ftgmac100.c
index c2e2ac6..8f3f2cf 100644
--- a/drivers/net/ethernet/faraday/ftgmac100.c
+++ b/drivers/net/ethernet/faraday/ftgmac100.c
@@ -71,7 +71,6 @@ struct ftgmac100 {
 	struct napi_struct napi;
 
 	struct mii_bus *mii_bus;
-	int phy_irq[PHY_MAX_ADDR];
 	struct phy_device *phydev;
 	int old_speed;
 };
@@ -1188,7 +1187,6 @@ static int ftgmac100_probe(struct platform_device *pdev)
 	struct net_device *netdev;
 	struct ftgmac100 *priv;
 	int err;
-	int i;
 
 	if (!pdev)
 		return -ENODEV;
@@ -1257,10 +1255,6 @@ static int ftgmac100_probe(struct platform_device *pdev)
 	priv->mii_bus->priv = netdev;
 	priv->mii_bus->read = ftgmac100_mdiobus_read;
 	priv->mii_bus->write = ftgmac100_mdiobus_write;
-	priv->mii_bus->irq = priv->phy_irq;
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		priv->mii_bus->irq[i] = PHY_POLL;
 
 	err = mdiobus_register(priv->mii_bus);
 	if (err) {
diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index ceabe21..da255fb 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1983,7 +1983,7 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
 	struct device_node *node;
-	int err = -ENXIO, i;
+	int err = -ENXIO;
 	u32 mii_speed, holdtime;
 
 	/*
@@ -2065,15 +2065,6 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 	fep->mii_bus->priv = fep;
 	fep->mii_bus->parent = &pdev->dev;
 
-	fep->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!fep->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		fep->mii_bus->irq[i] = PHY_POLL;
-
 	node = of_get_child_by_name(pdev->dev.of_node, "mdio");
 	if (node) {
 		err = of_mdiobus_register(fep->mii_bus, node);
@@ -2083,7 +2074,7 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 	}
 
 	if (err)
-		goto err_out_free_mdio_irq;
+		goto err_out_free_mdiobus;
 
 	mii_cnt++;
 
@@ -2093,8 +2084,6 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 
 	return 0;
 
-err_out_free_mdio_irq:
-	kfree(fep->mii_bus->irq);
 err_out_free_mdiobus:
 	mdiobus_free(fep->mii_bus);
 err_out:
@@ -2105,7 +2094,6 @@ static void fec_enet_mii_remove(struct fec_enet_private *fep)
 {
 	if (--mii_cnt == 0) {
 		mdiobus_unregister(fep->mii_bus);
-		kfree(fep->mii_bus->irq);
 		mdiobus_free(fep->mii_bus);
 	}
 }
diff --git a/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
index 1e647be..b5497e3 100644
--- a/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
+++ b/drivers/net/ethernet/freescale/fec_mpc52xx_phy.c
@@ -22,7 +22,6 @@
 
 struct mpc52xx_fec_mdio_priv {
 	struct mpc52xx_fec __iomem *regs;
-	int mdio_irqs[PHY_MAX_ADDR];
 };
 
 static int mpc52xx_fec_mdio_transfer(struct mii_bus *bus, int phy_id,
@@ -83,9 +82,6 @@ static int mpc52xx_fec_mdio_probe(struct platform_device *of)
 	bus->read = mpc52xx_fec_mdio_read;
 	bus->write = mpc52xx_fec_mdio_write;
 
-	/* setup irqs */
-	bus->irq = priv->mdio_irqs;
-
 	/* setup registers */
 	err = of_address_to_resource(np, 0, &res);
 	if (err)
diff --git a/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c b/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
index 68a428d..1f015ed 100644
--- a/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
+++ b/drivers/net/ethernet/freescale/fs_enet/mii-bitbang.c
@@ -172,23 +172,16 @@ static int fs_enet_mdio_probe(struct platform_device *ofdev)
 		goto out_free_bus;
 
 	new_bus->phy_mask = ~0;
-	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!new_bus->irq) {
-		ret = -ENOMEM;
-		goto out_unmap_regs;
-	}
 
 	new_bus->parent = &ofdev->dev;
 	platform_set_drvdata(ofdev, new_bus);
 
 	ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);
 	if (ret)
-		goto out_free_irqs;
+		goto out_unmap_regs;
 
 	return 0;
 
-out_free_irqs:
-	kfree(new_bus->irq);
 out_unmap_regs:
 	iounmap(bitbang->dir);
 out_free_bus:
@@ -205,7 +198,6 @@ static int fs_enet_mdio_remove(struct platform_device *ofdev)
 	struct bb_info *bitbang = bus->priv;
 
 	mdiobus_unregister(bus);
-	kfree(bus->irq);
 	free_mdio_bitbang(bus);
 	iounmap(bitbang->dir);
 	kfree(bitbang);
diff --git a/drivers/net/ethernet/freescale/fs_enet/mii-fec.c b/drivers/net/ethernet/freescale/fs_enet/mii-fec.c
index 2be383e..a89267b 100644
--- a/drivers/net/ethernet/freescale/fs_enet/mii-fec.c
+++ b/drivers/net/ethernet/freescale/fs_enet/mii-fec.c
@@ -166,23 +166,16 @@ static int fs_enet_mdio_probe(struct platform_device *ofdev)
 	clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, fec->mii_speed);
 
 	new_bus->phy_mask = ~0;
-	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!new_bus->irq) {
-		ret = -ENOMEM;
-		goto out_unmap_regs;
-	}
 
 	new_bus->parent = &ofdev->dev;
 	platform_set_drvdata(ofdev, new_bus);
 
 	ret = of_mdiobus_register(new_bus, ofdev->dev.of_node);
 	if (ret)
-		goto out_free_irqs;
+		goto out_unmap_regs;
 
 	return 0;
 
-out_free_irqs:
-	kfree(new_bus->irq);
 out_unmap_regs:
 	iounmap(fec->fecp);
 out_res:
@@ -200,7 +193,6 @@ static int fs_enet_mdio_remove(struct platform_device *ofdev)
 	struct fec_info *fec = bus->priv;
 
 	mdiobus_unregister(bus);
-	kfree(bus->irq);
 	iounmap(fec->fecp);
 	kfree(fec);
 	mdiobus_free(bus);
diff --git a/drivers/net/ethernet/freescale/fsl_pq_mdio.c b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
index 40071da..622005a 100644
--- a/drivers/net/ethernet/freescale/fsl_pq_mdio.c
+++ b/drivers/net/ethernet/freescale/fsl_pq_mdio.c
@@ -69,7 +69,6 @@ struct fsl_pq_mdio {
 struct fsl_pq_mdio_priv {
 	void __iomem *map;
 	struct fsl_pq_mii __iomem *regs;
-	int irqs[PHY_MAX_ADDR];
 };
 
 /*
@@ -401,7 +400,6 @@ static int fsl_pq_mdio_probe(struct platform_device *pdev)
 	new_bus->read = &fsl_pq_mdio_read;
 	new_bus->write = &fsl_pq_mdio_write;
 	new_bus->reset = &fsl_pq_mdio_reset;
-	new_bus->irq = priv->irqs;
 
 	err = of_address_to_resource(np, 0, &res);
 	if (err < 0) {
diff --git a/drivers/net/ethernet/hisilicon/hns_mdio.c b/drivers/net/ethernet/hisilicon/hns_mdio.c
index 37491c8..58c96c4 100644
--- a/drivers/net/ethernet/hisilicon/hns_mdio.c
+++ b/drivers/net/ethernet/hisilicon/hns_mdio.c
@@ -463,11 +463,6 @@ static int hns_mdio_probe(struct platform_device *pdev)
 		dev_warn(&pdev->dev, "no syscon hisilicon,peri-c-subctrl\n");
 		mdio_dev->subctrl_vbase = NULL;
 	}
-	new_bus->irq = devm_kcalloc(&pdev->dev, PHY_MAX_ADDR,
-				    sizeof(int), GFP_KERNEL);
-	if (!new_bus->irq)
-		return -ENOMEM;
-
 	new_bus->parent = &pdev->dev;
 	platform_set_drvdata(pdev, new_bus);
 
diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c
index 86238a5..fb61f7f 100644
--- a/drivers/net/ethernet/lantiq_etop.c
+++ b/drivers/net/ethernet/lantiq_etop.c
@@ -433,18 +433,9 @@ ltq_etop_mdio_init(struct net_device *dev)
 	priv->mii_bus->name = "ltq_mii";
 	snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		priv->pdev->name, priv->pdev->id);
-	priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!priv->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; ++i)
-		priv->mii_bus->irq[i] = PHY_POLL;
-
 	if (mdiobus_register(priv->mii_bus)) {
 		err = -ENXIO;
-		goto err_out_free_mdio_irq;
+		goto err_out_free_mdiobus;
 	}
 
 	if (ltq_etop_mdio_probe(dev)) {
@@ -455,8 +446,6 @@ ltq_etop_mdio_init(struct net_device *dev)
 
 err_out_unregister_bus:
 	mdiobus_unregister(priv->mii_bus);
-err_out_free_mdio_irq:
-	kfree(priv->mii_bus->irq);
 err_out_free_mdiobus:
 	mdiobus_free(priv->mii_bus);
 err_out:
@@ -470,7 +459,6 @@ ltq_etop_mdio_cleanup(struct net_device *dev)
 
 	phy_disconnect(priv->phydev);
 	mdiobus_unregister(priv->mii_bus);
-	kfree(priv->mii_bus->irq);
 	mdiobus_free(priv->mii_bus);
 }
 
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index fc2fb25..8982c88 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -187,7 +187,7 @@ static int orion_mdio_probe(struct platform_device *pdev)
 	struct resource *r;
 	struct mii_bus *bus;
 	struct orion_mdio_dev *dev;
-	int i, ret;
+	int ret;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r) {
@@ -207,14 +207,6 @@ static int orion_mdio_probe(struct platform_device *pdev)
 		 dev_name(&pdev->dev));
 	bus->parent = &pdev->dev;
 
-	bus->irq = devm_kmalloc_array(&pdev->dev, PHY_MAX_ADDR, sizeof(int),
-				      GFP_KERNEL);
-	if (!bus->irq)
-		return -ENOMEM;
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		bus->irq[i] = PHY_POLL;
-
 	dev = bus->priv;
 	dev->regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
 	if (!dev->regs) {
diff --git a/drivers/net/ethernet/nxp/lpc_eth.c b/drivers/net/ethernet/nxp/lpc_eth.c
index 024bc36..a9ce37f 100644
--- a/drivers/net/ethernet/nxp/lpc_eth.c
+++ b/drivers/net/ethernet/nxp/lpc_eth.c
@@ -850,19 +850,10 @@ static int lpc_mii_init(struct netdata_local *pldat)
 	pldat->mii_bus->priv = pldat;
 	pldat->mii_bus->parent = &pldat->pdev->dev;
 
-	pldat->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!pldat->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_1;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		pldat->mii_bus->irq[i] = PHY_POLL;
-
 	platform_set_drvdata(pldat->pdev, pldat->mii_bus);
 
 	if (mdiobus_register(pldat->mii_bus))
-		goto err_out_free_mdio_irq;
+		goto err_out_unregister_bus;
 
 	if (lpc_mii_probe(pldat->ndev) != 0)
 		goto err_out_unregister_bus;
@@ -871,8 +862,6 @@ static int lpc_mii_init(struct netdata_local *pldat)
 
 err_out_unregister_bus:
 	mdiobus_unregister(pldat->mii_bus);
-err_out_free_mdio_irq:
-	kfree(pldat->mii_bus->irq);
 err_out_1:
 	mdiobus_free(pldat->mii_bus);
 err_out:
diff --git a/drivers/net/ethernet/rdc/r6040.c b/drivers/net/ethernet/rdc/r6040.c
index 174dea7..6b541e5 100644
--- a/drivers/net/ethernet/rdc/r6040.c
+++ b/drivers/net/ethernet/rdc/r6040.c
@@ -1075,7 +1075,6 @@ static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	static int card_idx = -1;
 	int bar = 0;
 	u16 *adrp;
-	int i;
 
 	pr_info("%s\n", version);
 
@@ -1187,19 +1186,11 @@ static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	lp->mii_bus->name = "r6040_eth_mii";
 	snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		dev_name(&pdev->dev), card_idx);
-	lp->mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
-	if (!lp->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_mdio;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		lp->mii_bus->irq[i] = PHY_POLL;
 
 	err = mdiobus_register(lp->mii_bus);
 	if (err) {
 		dev_err(&pdev->dev, "failed to register MII bus\n");
-		goto err_out_mdio_irq;
+		goto err_out_mdio;
 	}
 
 	err = r6040_mii_probe(dev);
@@ -1218,8 +1209,6 @@ static int r6040_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 err_out_mdio_unregister:
 	mdiobus_unregister(lp->mii_bus);
-err_out_mdio_irq:
-	kfree(lp->mii_bus->irq);
 err_out_mdio:
 	mdiobus_free(lp->mii_bus);
 err_out_unmap:
@@ -1242,7 +1231,6 @@ static void r6040_remove_one(struct pci_dev *pdev)
 
 	unregister_netdev(dev);
 	mdiobus_unregister(lp->mii_bus);
-	kfree(lp->mii_bus->irq);
 	mdiobus_free(lp->mii_bus);
 	netif_napi_del(&lp->napi);
 	pci_iounmap(pdev, lp->base);
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 94581be..c5ec57ce 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2859,7 +2859,7 @@ static int sh_mdio_release(struct sh_eth_private *mdp)
 static int sh_mdio_init(struct sh_eth_private *mdp,
 			struct sh_eth_plat_data *pd)
 {
-	int ret, i;
+	int ret;
 	struct bb_info *bitbang;
 	struct platform_device *pdev = mdp->pdev;
 	struct device *dev = &mdp->pdev->dev;
@@ -2885,20 +2885,10 @@ static int sh_mdio_init(struct sh_eth_private *mdp,
 	snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		 pdev->name, pdev->id);
 
-	/* PHY IRQ */
-	mdp->mii_bus->irq = devm_kmalloc_array(dev, PHY_MAX_ADDR, sizeof(int),
-					       GFP_KERNEL);
-	if (!mdp->mii_bus->irq) {
-		ret = -ENOMEM;
-		goto out_free_bus;
-	}
-
 	/* 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;
 		if (pd->phy_irq > 0)
 			mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
 
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c
index 139b99b..c74e78d 100644
--- a/drivers/net/ethernet/smsc/smsc911x.c
+++ b/drivers/net/ethernet/smsc/smsc911x.c
@@ -1059,7 +1059,7 @@ static int smsc911x_mii_init(struct platform_device *pdev,
 			     struct net_device *dev)
 {
 	struct smsc911x_data *pdata = netdev_priv(dev);
-	int err = -ENXIO, i;
+	int err = -ENXIO;
 
 	pdata->mii_bus = mdiobus_alloc();
 	if (!pdata->mii_bus) {
@@ -1073,9 +1073,7 @@ static int smsc911x_mii_init(struct platform_device *pdev,
 	pdata->mii_bus->priv = pdata;
 	pdata->mii_bus->read = smsc911x_mii_read;
 	pdata->mii_bus->write = smsc911x_mii_write;
-	pdata->mii_bus->irq = pdata->phy_irq;
-	for (i = 0; i < PHY_MAX_ADDR; ++i)
-		pdata->mii_bus->irq[i] = PHY_POLL;
+	memcpy(pdata->mii_bus->irq, pdata->phy_irq, sizeof(pdata->mii_bus));
 
 	pdata->mii_bus->parent = &pdev->dev;
 
diff --git a/drivers/net/ethernet/smsc/smsc9420.c b/drivers/net/ethernet/smsc/smsc9420.c
index fa8893a..59bf4c3 100644
--- a/drivers/net/ethernet/smsc/smsc9420.c
+++ b/drivers/net/ethernet/smsc/smsc9420.c
@@ -78,7 +78,6 @@ struct smsc9420_pdata {
 
 	struct phy_device *phy_dev;
 	struct mii_bus *mii_bus;
-	int phy_irq[PHY_MAX_ADDR];
 	int last_duplex;
 	int last_carrier;
 };
@@ -1188,7 +1187,7 @@ static int smsc9420_mii_probe(struct net_device *dev)
 static int smsc9420_mii_init(struct net_device *dev)
 {
 	struct smsc9420_pdata *pd = netdev_priv(dev);
-	int err = -ENXIO, i;
+	int err = -ENXIO;
 
 	pd->mii_bus = mdiobus_alloc();
 	if (!pd->mii_bus) {
@@ -1201,9 +1200,6 @@ static int smsc9420_mii_init(struct net_device *dev)
 	pd->mii_bus->priv = pd;
 	pd->mii_bus->read = smsc9420_mii_read;
 	pd->mii_bus->write = smsc9420_mii_write;
-	pd->mii_bus->irq = pd->phy_irq;
-	for (i = 0; i < PHY_MAX_ADDR; ++i)
-		pd->mii_bus->irq[i] = PHY_POLL;
 
 	/* Mask all PHYs except ID 1 (internal) */
 	pd->mii_bus->phy_mask = ~(1 << 1);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 05ba841..f0990eb 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -196,7 +196,6 @@ int stmmac_mdio_register(struct net_device *ndev)
 {
 	int err = 0;
 	struct mii_bus *new_bus;
-	int *irqlist;
 	struct stmmac_priv *priv = netdev_priv(ndev);
 	struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data;
 	int addr, found;
@@ -227,13 +226,8 @@ int stmmac_mdio_register(struct net_device *ndev)
 	if (new_bus == NULL)
 		return -ENOMEM;
 
-	if (mdio_bus_data->irqs) {
-		irqlist = mdio_bus_data->irqs;
-	} else {
-		for (addr = 0; addr < PHY_MAX_ADDR; addr++)
-			priv->mii_irq[addr] = PHY_POLL;
-		irqlist = priv->mii_irq;
-	}
+	if (mdio_bus_data->irqs)
+		memcpy(new_bus->irq, mdio_bus_data, sizeof(new_bus->irq));
 
 #ifdef CONFIG_OF
 	if (priv->device->of_node)
@@ -247,7 +241,6 @@ int stmmac_mdio_register(struct net_device *ndev)
 	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		 new_bus->name, priv->plat->bus_id);
 	new_bus->priv = ndev;
-	new_bus->irq = irqlist;
 	new_bus->phy_mask = mdio_bus_data->phy_mask;
 	new_bus->parent = priv->device;
 
@@ -271,7 +264,8 @@ int stmmac_mdio_register(struct net_device *ndev)
 			 */
 			if ((mdio_bus_data->irqs == NULL) &&
 			    (mdio_bus_data->probed_phy_irq > 0)) {
-				irqlist[addr] = mdio_bus_data->probed_phy_irq;
+				new_bus->irq[addr] =
+					mdio_bus_data->probed_phy_irq;
 				phydev->irq = mdio_bus_data->probed_phy_irq;
 			}
 
diff --git a/drivers/net/ethernet/synopsys/dwc_eth_qos.c b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
index b25ee37..6dbb681 100644
--- a/drivers/net/ethernet/synopsys/dwc_eth_qos.c
+++ b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
@@ -1220,7 +1220,7 @@ static void dwceqos_enable_mmc_interrupt(struct net_local *lp)
 
 static int dwceqos_mii_init(struct net_local *lp)
 {
-	int ret = -ENXIO, i;
+	int ret = -ENXIO;
 	struct resource res;
 	struct device_node *mdionode;
 
@@ -1241,24 +1241,14 @@ static int dwceqos_mii_init(struct net_local *lp)
 	lp->mii_bus->priv = lp;
 	lp->mii_bus->parent = &lp->ndev->dev;
 
-	lp->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!lp->mii_bus->irq) {
-		ret = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		lp->mii_bus->irq[i] = PHY_POLL;
 	of_address_to_resource(lp->pdev->dev.of_node, 0, &res);
 	snprintf(lp->mii_bus->id, MII_BUS_ID_SIZE, "%.8llx",
 		 (unsigned long long)res.start);
 	if (of_mdiobus_register(lp->mii_bus, mdionode))
-		goto err_out_free_mdio_irq;
+		goto err_out_free_mdiobus;
 
 	return 0;
 
-err_out_free_mdio_irq:
-	kfree(lp->mii_bus->irq);
 err_out_free_mdiobus:
 	mdiobus_free(lp->mii_bus);
 err_out:
@@ -2977,7 +2967,6 @@ static int dwceqos_remove(struct platform_device *pdev)
 		if (lp->phy_dev)
 			phy_disconnect(lp->phy_dev);
 		mdiobus_unregister(lp->mii_bus);
-		kfree(lp->mii_bus->irq);
 		mdiobus_free(lp->mii_bus);
 
 		unregister_netdev(ndev);
diff --git a/drivers/net/ethernet/ti/cpmac.c b/drivers/net/ethernet/ti/cpmac.c
index 77d26fe..0b48330 100644
--- a/drivers/net/ethernet/ti/cpmac.c
+++ b/drivers/net/ethernet/ti/cpmac.c
@@ -316,8 +316,6 @@ static int cpmac_mdio_reset(struct mii_bus *bus)
 	return 0;
 }
 
-static int mii_irqs[PHY_MAX_ADDR] = { PHY_POLL, };
-
 static struct mii_bus *cpmac_mii;
 
 static void cpmac_set_multicast_list(struct net_device *dev)
@@ -1226,7 +1224,6 @@ int cpmac_init(void)
 	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);
 
diff --git a/drivers/net/ethernet/toshiba/tc35815.c b/drivers/net/ethernet/toshiba/tc35815.c
index 8fd5e0b..fed5e3d 100644
--- a/drivers/net/ethernet/toshiba/tc35815.c
+++ b/drivers/net/ethernet/toshiba/tc35815.c
@@ -682,18 +682,9 @@ static int tc_mii_init(struct net_device *dev)
 		 (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;
-
 	err = mdiobus_register(lp->mii_bus);
 	if (err)
-		goto err_out_free_mdio_irq;
+		goto err_out_free_mii_bus;
 	err = tc_mii_probe(dev);
 	if (err)
 		goto err_out_unregister_bus;
@@ -701,8 +692,6 @@ static int tc_mii_init(struct net_device *dev)
 
 err_out_unregister_bus:
 	mdiobus_unregister(lp->mii_bus);
-err_out_free_mdio_irq:
-	kfree(lp->mii_bus->irq);
 err_out_free_mii_bus:
 	mdiobus_free(lp->mii_bus);
 err_out:
@@ -880,7 +869,6 @@ static void tc35815_remove_one(struct pci_dev *pdev)
 
 	phy_disconnect(lp->phy_dev);
 	mdiobus_unregister(lp->mii_bus);
-	kfree(lp->mii_bus->irq);
 	mdiobus_free(lp->mii_bus);
 	unregister_netdev(dev);
 	free_netdev(dev);
diff --git a/drivers/net/ethernet/xilinx/ll_temac.h b/drivers/net/ethernet/xilinx/ll_temac.h
index 522abe2..902457e 100644
--- a/drivers/net/ethernet/xilinx/ll_temac.h
+++ b/drivers/net/ethernet/xilinx/ll_temac.h
@@ -337,7 +337,6 @@ struct temac_local {
 
 	/* MDIO bus data */
 	struct mii_bus *mii_bus;	/* MII bus reference */
-	int mdio_irqs[PHY_MAX_ADDR];	/* IRQs table for MDIO bus */
 
 	/* IO registers, dma functions and IRQs */
 	void __iomem *regs;
diff --git a/drivers/net/ethernet/xilinx/ll_temac_mdio.c b/drivers/net/ethernet/xilinx/ll_temac_mdio.c
index 415de1e..7714aff 100644
--- a/drivers/net/ethernet/xilinx/ll_temac_mdio.c
+++ b/drivers/net/ethernet/xilinx/ll_temac_mdio.c
@@ -92,7 +92,6 @@ int temac_mdio_setup(struct temac_local *lp, struct device_node *np)
 	bus->read = temac_mdio_read;
 	bus->write = temac_mdio_write;
 	bus->parent = lp->dev;
-	bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
 
 	lp->mii_bus = bus;
 
@@ -114,7 +113,6 @@ int temac_mdio_setup(struct temac_local *lp, struct device_node *np)
 void temac_mdio_teardown(struct temac_local *lp)
 {
 	mdiobus_unregister(lp->mii_bus);
-	kfree(lp->mii_bus->irq);
 	mdiobus_free(lp->mii_bus);
 	lp->mii_bus = NULL;
 }
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet.h b/drivers/net/ethernet/xilinx/xilinx_axienet.h
index 7cb9aba..9ead4e2 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet.h
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet.h
@@ -385,7 +385,6 @@ struct axidma_bd {
  * @phy_dev:	Pointer to PHY device structure attached to the axienet_local
  * @phy_node:	Pointer to device node structure
  * @mii_bus:	Pointer to MII bus structure
- * @mdio_irqs:	IRQs table for MDIO bus required in mii_bus structure
  * @regs:	Base address for the axienet_local device address space
  * @dma_regs:	Base address for the axidma device address space
  * @dma_err_tasklet: Tasklet structure to process Axi DMA errors
@@ -426,7 +425,6 @@ struct axienet_local {
 
 	/* MDIO bus data */
 	struct mii_bus *mii_bus;	/* MII bus reference */
-	int mdio_irqs[PHY_MAX_ADDR];	/* IRQs table for MDIO bus */
 
 	/* IO registers, dma functions and IRQs */
 	void __iomem *regs;
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c b/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
index 507bbb0..63307ea 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c
@@ -212,7 +212,6 @@ issue:
 	bus->read = axienet_mdio_read;
 	bus->write = axienet_mdio_write;
 	bus->parent = lp->dev;
-	bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
 	lp->mii_bus = bus;
 
 	ret = of_mdiobus_register(bus, np1);
@@ -232,7 +231,6 @@ issue:
 void axienet_mdio_teardown(struct axienet_local *lp)
 {
 	mdiobus_unregister(lp->mii_bus);
-	kfree(lp->mii_bus->irq);
 	mdiobus_free(lp->mii_bus);
 	lp->mii_bus = NULL;
 }
diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
index cf468c8..d1a0167 100644
--- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
+++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
@@ -114,7 +114,6 @@
  * @phy_dev:		pointer to the PHY device
  * @phy_node:		pointer to the PHY device node
  * @mii_bus:		pointer to the MII bus
- * @mdio_irqs:		IRQs table for MDIO bus
  * @last_link:		last link status
  * @has_mdio:		indicates whether MDIO is included in the HW
  */
@@ -135,7 +134,6 @@ struct net_local {
 	struct device_node *phy_node;
 
 	struct mii_bus *mii_bus;
-	int mdio_irqs[PHY_MAX_ADDR];
 
 	int last_link;
 	bool has_mdio;
@@ -852,7 +850,6 @@ static int xemaclite_mdio_setup(struct net_local *lp, struct device *dev)
 	bus->read = xemaclite_mdio_read;
 	bus->write = xemaclite_mdio_write;
 	bus->parent = dev;
-	bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
 
 	lp->mii_bus = bus;
 
@@ -1196,7 +1193,6 @@ static int xemaclite_of_remove(struct platform_device *of_dev)
 	/* Un-register the mii_bus, if configured */
 	if (lp->has_mdio) {
 		mdiobus_unregister(lp->mii_bus);
-		kfree(lp->mii_bus->irq);
 		mdiobus_free(lp->mii_bus);
 		lp->mii_bus = NULL;
 	}
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index e23bf5b..0a1cde6 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -27,7 +27,6 @@
 #define MII_REGS_NUM 29
 
 struct fixed_mdio_bus {
-	int irqs[PHY_MAX_ADDR];
 	struct mii_bus *mii_bus;
 	struct list_head phys;
 };
@@ -256,7 +255,7 @@ int fixed_phy_add(unsigned int irq, int phy_addr,
 
 	memset(fp->regs, 0xFF,  sizeof(fp->regs[0]) * MII_REGS_NUM);
 
-	fmb->irqs[phy_addr] = irq;
+	fmb->mii_bus->irq[phy_addr] = irq;
 
 	fp->addr = phy_addr;
 	fp->status = *status;
@@ -395,7 +394,6 @@ static int __init fixed_mdio_bus_init(void)
 	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)
diff --git a/drivers/net/phy/mdio-bcm-unimac.c b/drivers/net/phy/mdio-bcm-unimac.c
index 4bde5e7..8c73b2e 100644
--- a/drivers/net/phy/mdio-bcm-unimac.c
+++ b/drivers/net/phy/mdio-bcm-unimac.c
@@ -200,16 +200,10 @@ static int unimac_mdio_probe(struct platform_device *pdev)
 	bus->reset = unimac_mdio_reset;
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
 
-	bus->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
-	if (!bus->irq) {
-		ret = -ENOMEM;
-		goto out_mdio_free;
-	}
-
 	ret = of_mdiobus_register(bus, np);
 	if (ret) {
 		dev_err(&pdev->dev, "MDIO bus registration failed\n");
-		goto out_mdio_irq;
+		goto out_mdio_free;
 	}
 
 	platform_set_drvdata(pdev, priv);
@@ -218,8 +212,6 @@ static int unimac_mdio_probe(struct platform_device *pdev)
 
 	return 0;
 
-out_mdio_irq:
-	kfree(bus->irq);
 out_mdio_free:
 	mdiobus_free(bus);
 	return ret;
@@ -230,7 +222,6 @@ static int unimac_mdio_remove(struct platform_device *pdev)
 	struct unimac_mdio_priv *priv = platform_get_drvdata(pdev);
 
 	mdiobus_unregister(priv->mii_bus);
-	kfree(priv->mii_bus->irq);
 	mdiobus_free(priv->mii_bus);
 
 	return 0;
diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 95f51d7..27ab630 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -159,7 +159,7 @@ static struct mii_bus *mdio_gpio_bus_init(struct device *dev,
 
 	new_bus->phy_mask = pdata->phy_mask;
 	new_bus->phy_ignore_ta_mask = pdata->phy_ignore_ta_mask;
-	new_bus->irq = pdata->irqs;
+	memcpy(new_bus->irq, pdata->irqs, sizeof(new_bus->irq));
 	new_bus->parent = dev;
 
 	if (new_bus->phy_mask == ~0)
diff --git a/drivers/net/phy/mdio-moxart.c b/drivers/net/phy/mdio-moxart.c
index f1fc51f..5bb56d1 100644
--- a/drivers/net/phy/mdio-moxart.c
+++ b/drivers/net/phy/mdio-moxart.c
@@ -130,13 +130,6 @@ static int moxart_mdio_probe(struct platform_device *pdev)
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-%d-mii", pdev->name, pdev->id);
 	bus->parent = &pdev->dev;
 
-	bus->irq = devm_kzalloc(&pdev->dev, sizeof(int) * PHY_MAX_ADDR,
-			GFP_KERNEL);
-	if (!bus->irq) {
-		ret = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
 	/* Setting PHY_IGNORE_INTERRUPT here even if it has no effect,
 	 * of_mdiobus_register() sets these PHY_POLL.
 	 * Ideally, the interrupt from MAC controller could be used to
diff --git a/drivers/net/phy/mdio-mux.c b/drivers/net/phy/mdio-mux.c
index 7f8e766..308ade0 100644
--- a/drivers/net/phy/mdio-mux.c
+++ b/drivers/net/phy/mdio-mux.c
@@ -34,7 +34,6 @@ struct mdio_mux_child_bus {
 	struct mdio_mux_parent_bus *parent;
 	struct mdio_mux_child_bus *next;
 	int bus_number;
-	int phy_irq[PHY_MAX_ADDR];
 };
 
 /*
@@ -157,7 +156,7 @@ int mdio_mux_init(struct device *dev,
 			break;
 		}
 		cb->mii_bus->priv = cb;
-		cb->mii_bus->irq = cb->phy_irq;
+
 		cb->mii_bus->name = "mdio_mux";
 		snprintf(cb->mii_bus->id, MII_BUS_ID_SIZE, "%x.%x",
 			 pb->parent_id, v);
diff --git a/drivers/net/phy/mdio-octeon.c b/drivers/net/phy/mdio-octeon.c
index 0d5da13..47d4f2f 100644
--- a/drivers/net/phy/mdio-octeon.c
+++ b/drivers/net/phy/mdio-octeon.c
@@ -113,7 +113,6 @@ struct octeon_mdiobus {
 	resource_size_t mdio_phys;
 	resource_size_t regsize;
 	enum octeon_mdiobus_mode mode;
-	int phy_irq[PHY_MAX_ADDR];
 };
 
 #ifdef CONFIG_CAVIUM_OCTEON_SOC
@@ -306,7 +305,6 @@ static int octeon_mdiobus_probe(struct platform_device *pdev)
 	oct_mdio_writeq(smi_en.u64, bus->register_base + SMI_EN);
 
 	bus->mii_bus->priv = bus;
-	bus->mii_bus->irq = bus->phy_irq;
 	bus->mii_bus->name = "mdio-octeon";
 	snprintf(bus->mii_bus->id, MII_BUS_ID_SIZE, "%llx", bus->register_base);
 	bus->mii_bus->parent = &pdev->dev;
diff --git a/drivers/net/phy/mdio-sun4i.c b/drivers/net/phy/mdio-sun4i.c
index 15bc7f9..f70522c 100644
--- a/drivers/net/phy/mdio-sun4i.c
+++ b/drivers/net/phy/mdio-sun4i.c
@@ -96,7 +96,7 @@ static int sun4i_mdio_probe(struct platform_device *pdev)
 	struct mii_bus *bus;
 	struct sun4i_mdio_data *data;
 	struct resource *res;
-	int ret, i;
+	int ret;
 
 	bus = mdiobus_alloc_size(sizeof(*data));
 	if (!bus)
@@ -108,16 +108,6 @@ static int sun4i_mdio_probe(struct platform_device *pdev)
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));
 	bus->parent = &pdev->dev;
 
-	bus->irq = devm_kzalloc(&pdev->dev, sizeof(int) * PHY_MAX_ADDR,
-			GFP_KERNEL);
-	if (!bus->irq) {
-		ret = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		bus->irq[i] = PHY_POLL;
-
 	data = bus->priv;
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	data->membase = devm_ioremap_resource(&pdev->dev, res);
diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 88cb459..05381d0 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -51,6 +51,7 @@ struct mii_bus *mdiobus_alloc_size(size_t size)
 	struct mii_bus *bus;
 	size_t aligned_size = ALIGN(sizeof(*bus), NETDEV_ALIGN);
 	size_t alloc_size;
+	int i;
 
 	/* If we alloc extra space, it should be aligned */
 	if (size)
@@ -65,6 +66,10 @@ struct mii_bus *mdiobus_alloc_size(size_t size)
 			bus->priv = (void *)bus + aligned_size;
 	}
 
+	/* Initialise the interrupts to polling */
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		bus->irq[i] = PHY_POLL;
+
 	return bus;
 }
 EXPORT_SYMBOL(mdiobus_alloc_size);
diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c
index 5f18fcb..224e7d8 100644
--- a/drivers/net/usb/ax88172a.c
+++ b/drivers/net/usb/ax88172a.c
@@ -98,7 +98,7 @@ static void ax88172a_status(struct usbnet *dev, struct urb *urb)
 static int ax88172a_init_mdio(struct usbnet *dev)
 {
 	struct ax88172a_private *priv = dev->driver_priv;
-	int ret, i;
+	int ret;
 
 	priv->mdio = mdiobus_alloc();
 	if (!priv->mdio) {
@@ -114,25 +114,15 @@ static int ax88172a_init_mdio(struct usbnet *dev)
 	snprintf(priv->mdio->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
 		 dev->udev->bus->busnum, dev->udev->devnum);
 
-	priv->mdio->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!priv->mdio->irq) {
-		ret = -ENOMEM;
-		goto mfree;
-	}
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		priv->mdio->irq[i] = PHY_POLL;
-
 	ret = mdiobus_register(priv->mdio);
 	if (ret) {
 		netdev_err(dev->net, "Could not register MDIO bus\n");
-		goto ifree;
+		goto mfree;
 	}
 
 	netdev_info(dev->net, "registered mdio bus %s\n", priv->mdio->id);
 	return 0;
 
-ifree:
-	kfree(priv->mdio->irq);
 mfree:
 	mdiobus_free(priv->mdio);
 	return ret;
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 226668e..1662b7b 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -1458,12 +1458,6 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev)
 	snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",
 		 dev->udev->bus->busnum, dev->udev->devnum);
 
-	dev->mdiobus->irq = kzalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!dev->mdiobus->irq) {
-		ret = -ENOMEM;
-		goto exit1;
-	}
-
 	/* handle our own interrupt */
 	for (i = 0; i < PHY_MAX_ADDR; i++)
 		dev->mdiobus->irq[i] = PHY_IGNORE_INTERRUPT;
@@ -1479,13 +1473,11 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev)
 	ret = mdiobus_register(dev->mdiobus);
 	if (ret) {
 		netdev_err(dev->net, "can't register MDIO bus\n");
-		goto exit2;
+		goto exit1;
 	}
 
 	netdev_dbg(dev->net, "registered mdiobus bus %s\n", dev->mdiobus->id);
 	return 0;
-exit2:
-	kfree(dev->mdiobus->irq);
 exit1:
 	mdiobus_free(dev->mdiobus);
 	return ret;
@@ -1494,7 +1486,6 @@ exit1:
 static void lan78xx_remove_mdio(struct lan78xx_net *dev)
 {
 	mdiobus_unregister(dev->mdiobus);
-	kfree(dev->mdiobus->irq);
 	mdiobus_free(dev->mdiobus);
 }
 
diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index a87a868..2f88ff4 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -127,17 +127,12 @@ int of_mdiobus_register(struct mii_bus *mdio, struct device_node *np)
 	struct device_node *child;
 	const __be32 *paddr;
 	bool scanphys = false;
-	int addr, rc, i;
+	int addr, rc;
 
 	/* Mask out all PHYs from auto probing.  Instead the PHYs listed in
 	 * the device tree are populated after the bus has been registered */
 	mdio->phy_mask = ~0;
 
-	/* Clear all the IRQ properties */
-	if (mdio->irq)
-		for (i=0; i<PHY_MAX_ADDR; i++)
-			mdio->irq[i] = PHY_POLL;
-
 	mdio->dev.of_node = np;
 
 	/* Register the MDIO bus */