igb: cleanup igb loopback path

The code path for setting up phy loopback testing was out of date and was
setting bits it didn't need to.  This change cleans up the code path and
removes some code that has no effect on teh driver.
Signed-off-by: NAlexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/igb/igb_ethtool.c

@@ -1419,7 +1419,6 @@ static int igb_integrated_phy_loopback(struct igb_adapter *adapter)
 {
 	struct e1000_hw *hw = &adapter->hw;
 	u32 ctrl_reg = 0;
-	u32 stat_reg = 0;
 
 	hw->mac.autoneg = false;
 
@@ -1443,18 +1442,11 @@ static int igb_integrated_phy_loopback(struct igb_adapter *adapter)
 	ctrl_reg |= (E1000_CTRL_FRCSPD | /* Set the Force Speed Bit */
 		     E1000_CTRL_FRCDPX | /* Set the Force Duplex Bit */
 		     E1000_CTRL_SPD_1000 |/* Force Speed to 1000 */
-		     E1000_CTRL_FD);	 /* Force Duplex to FULL */
+		     E1000_CTRL_FD |	 /* Force Duplex to FULL */
+		     E1000_CTRL_SLU);	 /* Set link up enable bit */
 
-	if (hw->phy.media_type == e1000_media_type_copper &&
-	    hw->phy.type == e1000_phy_m88)
+	if (hw->phy.type == e1000_phy_m88)
 		ctrl_reg |= E1000_CTRL_ILOS; /* Invert Loss of Signal */
-	else {
-		/* Set the ILOS bit on the fiber Nic if half duplex link is
-		 * detected. */
-		stat_reg = rd32(E1000_STATUS);
-		if ((stat_reg & E1000_STATUS_FD) == 0)
-			ctrl_reg |= (E1000_CTRL_ILOS | E1000_CTRL_SLU);
-	}
 
 	wr32(E1000_CTRL, ctrl_reg);