netdev/phy/icplus: Use mdiobus_write() and mdiobus_read() for proper locking.

Usually you have to take the bus lock.  Why not here too?

I saw this when working on something else.  Not even compile tested.
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Greg Dietsche <Gregory.Dietsche@cuw.edu>
Cc: "Uwe Kleine-Konig" <u.kleine-koenig@pengutronix.de>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/icplus.c

@@ -49,36 +49,36 @@ static int ip175c_config_init(struct phy_device *phydev)
 	if (full_reset_performed == 0) {
 
 		/* master reset */
-		err = phydev->bus->write(phydev->bus, 30, 0, 0x175c);
+		err = mdiobus_write(phydev->bus, 30, 0, 0x175c);
 		if (err < 0)
 			return err;
 
 		/* ensure no bus delays overlap reset period */
-		err = phydev->bus->read(phydev->bus, 30, 0);
+		err = mdiobus_read(phydev->bus, 30, 0);
 
 		/* data sheet specifies reset period is 2 msec */
 		mdelay(2);
 
 		/* enable IP175C mode */
-		err = phydev->bus->write(phydev->bus, 29, 31, 0x175c);
+		err = mdiobus_write(phydev->bus, 29, 31, 0x175c);
 		if (err < 0)
 			return err;
 
 		/* Set MII0 speed and duplex (in PHY mode) */
-		err = phydev->bus->write(phydev->bus, 29, 22, 0x420);
+		err = mdiobus_write(phydev->bus, 29, 22, 0x420);
 		if (err < 0)
 			return err;
 
 		/* reset switch ports */
 		for (i = 0; i < 5; i++) {
-			err = phydev->bus->write(phydev->bus, i,
+			err = mdiobus_write(phydev->bus, i,
 					    MII_BMCR, BMCR_RESET);
 			if (err < 0)
 				return err;
 		}
 
 		for (i = 0; i < 5; i++)
-			err = phydev->bus->read(phydev->bus, i, MII_BMCR);
+			err = mdiobus_read(phydev->bus, i, MII_BMCR);
 
 		mdelay(2);