net: arc_emac: Add support for ndo_do_ioctl net_device_ops operation

This operation is required for handling ioctl commands like SIOCGMIIREG,
when debugging MDIO registers from userspace.

This commit adds support for this operation.

Signed-off-by: Romain Perier <romain.perier@collabora.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/ethernet/arc/emac_main.c b/drivers/net/ethernet/arc/emac_main.c
index 68de2f2652f2..3241af1ce718 100644
--- a/drivers/net/ethernet/arc/emac_main.c
+++ b/drivers/net/ethernet/arc/emac_main.c
@@ -720,6 +720,18 @@ static int arc_emac_set_address(struct net_device *ndev, void *p)
         return 0;
 }
 
+static int arc_emac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+        if (!netif_running(dev))
+                return -EINVAL;
+
+        if (!dev->phydev)
+                return -ENODEV;
+
+        return phy_mii_ioctl(dev->phydev, rq, cmd);
+}
+
+
 static const struct net_device_ops arc_emac_netdev_ops = {
         .ndo_open               = arc_emac_open,
         .ndo_stop               = arc_emac_stop,
@@ -727,6 +739,7 @@ static const struct net_device_ops arc_emac_netdev_ops = {
         .ndo_set_mac_address    = arc_emac_set_address,
         .ndo_get_stats          = arc_emac_stats,
         .ndo_set_rx_mode        = arc_emac_set_rx_mode,
+        .ndo_do_ioctl           = arc_emac_ioctl,
 #ifdef CONFIG_NET_POLL_CONTROLLER
         .ndo_poll_controller    = arc_emac_poll_controller,
 #endif