sfc: Fix efx_ethtool_nway_result() to use clause 45 MDIO registers

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 1 deletions

diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index 7b5924c039b3..589d13292969 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -529,7 +529,14 @@ static int efx_ethtool_nway_reset(struct net_device *net_dev)
 {
         struct efx_nic *efx = netdev_priv(net_dev);
 
-        return mii_nway_restart(&efx->mii);
+        if (efx->phy_op->mmds & DEV_PRESENT_BIT(MDIO_MMD_AN)) {
+                mdio_clause45_set_flag(efx, efx->mii.phy_id, MDIO_MMD_AN,
+                                       MDIO_MMDREG_CTRL1,
+                                       __ffs(BMCR_ANRESTART), true);
+                return 0;
+        }
+
+        return -EOPNOTSUPP;
 }
 
 static u32 efx_ethtool_get_link(struct net_device *net_dev)