netdev - [PATCH v4 07/11] net: mvmdio: check the MII_ADDR

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Date:   Wed, 14 Jun 2017 17:49:07 +0200
From:   Antoine Tenart <antoine.tenart@...e-electrons.com>
To:     davem@...emloft.net, jason@...edaemon.net, andrew@...n.ch,
        gregory.clement@...e-electrons.com,
        sebastian.hesselbarth@...il.com, f.fainelli@...il.com
Cc:     Antoine Tenart <antoine.tenart@...e-electrons.com>,
        thomas.petazzoni@...e-electrons.com, nadavh@...vell.com,
        mw@...ihalf.com, linux@...linux.org.uk, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v4 07/11] 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@...e-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