sfc: Remove unused code for non-autoneg speed/duplex switching

The only multi-speed PHY driver using this is 10Xpress, and it does
not support non-autoneg operation.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/sfc/mdio_10g.c

@@ -248,7 +248,7 @@ void efx_mdio_set_mmds_lpower(struct efx_nic *efx,
 int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
 {
 	struct ethtool_cmd prev;
-	u32 required;
+	bool xnp;
 	int reg;
 
 	efx->phy_op->get_settings(efx, &prev);
@@ -265,27 +265,11 @@ int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
 		return -EINVAL;
 
 	/* Check that PHY supports these settings */
-	if (ecmd->autoneg) {
-		required = SUPPORTED_Autoneg;
-	} else if (ecmd->duplex) {
-		switch (ecmd->speed) {
-		case SPEED_10:  required = SUPPORTED_10baseT_Full;  break;
-		case SPEED_100: required = SUPPORTED_100baseT_Full; break;
-		default:        return -EINVAL;
-		}
-	} else {
-		switch (ecmd->speed) {
-		case SPEED_10:  required = SUPPORTED_10baseT_Half;  break;
-		case SPEED_100: required = SUPPORTED_100baseT_Half; break;
-		default:        return -EINVAL;
-		}
-	}
-	required |= ecmd->advertising;
-	if (required & ~prev.supported)
+	if (!ecmd->autoneg ||
+	    (ecmd->advertising | SUPPORTED_Autoneg) & ~prev.supported)
 		return -EINVAL;
 
-	if (ecmd->autoneg) {
-		bool xnp = (ecmd->advertising & ADVERTISED_10000baseT_Full
+	xnp = (ecmd->advertising & ADVERTISED_10000baseT_Full
 	       || EFX_WORKAROUND_13204(efx));
 
 	/* Set up the base page */
@@ -321,20 +305,6 @@ int efx_mdio_set_settings(struct efx_nic *efx, struct ethtool_cmd *ecmd)
 	else
 		reg &= ~MDIO_AN_CTRL1_XNP;
 	efx_mdio_write(efx, MDIO_MMD_AN, MDIO_CTRL1, reg);
-	} else {
-		/* Disable AN */
-		efx_mdio_set_flag(efx, MDIO_MMD_AN, MDIO_CTRL1,
-				  MDIO_AN_CTRL1_ENABLE, false);
-
-		/* Set the basic control bits */
-		reg = efx_mdio_read(efx, MDIO_MMD_PMAPMD, MDIO_CTRL1);
-		reg &= ~(MDIO_CTRL1_SPEEDSEL | MDIO_CTRL1_FULLDPLX);
-		if (ecmd->speed == SPEED_100)
-			reg |= MDIO_PMA_CTRL1_SPEED100;
-		if (ecmd->duplex)
-			reg |= MDIO_CTRL1_FULLDPLX;
-		efx_mdio_write(efx, MDIO_MMD_PMAPMD, MDIO_CTRL1, reg);
-	}
 
 	return 0;
 }