net: mvmdio: check the MII_ADDR_C45 bit is not set for smi operations

Add a check for the read and write smi operations, to ensure the
MII_ADDR_C45 bit isn't set. This will be needed as soon as the xSMI
support is added to the mvmdio driver.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index e4aa8e2..fe6072a 100644 (file)
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -126,6 +126,9 @@ static int orion_mdio_read(struct mii_bus *bus, int mii_id,
        u32 val;
        int ret;
 
+       if (regnum & MII_ADDR_C45)
+               return -EOPNOTSUPP;
+
        ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus);
        if (ret < 0)
                goto out;
@@ -157,6 +160,9 @@ static int orion_mdio_write(struct mii_bus *bus, int mii_id,
        struct orion_mdio_dev *dev = bus->priv;
        int ret;
 
+       if (regnum & MII_ADDR_C45)
+               return -EOPNOTSUPP;
+
        ret = orion_mdio_wait_ready(&orion_mdio_smi_ops, bus);
        if (ret < 0)
                goto out;