[PATCH v4 07/11] net: mvmdio: check the MII_ADDR_C45 bit is not set for smi operations

[Antoine Tenart]

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.ten...@free-electrons.com>
---
 drivers/net/ethernet/marvell/mvmdio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvmdio.c 
b/drivers/net/ethernet/marvell/mvmdio.c
index e4aa8e2d2e8a..fe6072aae0a6 100644
--- 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;
-- 
2.9.4