e1000e: flow control doesn't re-enable

When changing flow control (pause) parameters, the flow control thresholds
(i.e. when to send XON/XOFF frames) may not be setup correctly on parts
with copper media.  Call the existing e1000_set_fc_watermarks()
function to set these thresholds.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/e1000e/ethtool.c

@@ -335,10 +335,18 @@ static int e1000_set_pauseparam(struct net_device *netdev,
 
 		hw->fc.current_mode = hw->fc.requested_mode;
 
-		retval = ((hw->phy.media_type == e1000_media_type_fiber) ?
-			  hw->mac.ops.setup_link(hw) : e1000e_force_mac_fc(hw));
+		if (hw->phy.media_type == e1000_media_type_fiber) {
+			retval = hw->mac.ops.setup_link(hw);
+			/* implicit goto out */
+		} else {
+			retval = e1000e_force_mac_fc(hw);
+			if (retval)
+				goto out;
+			e1000e_set_fc_watermarks(hw);
+		}
 	}
 
+out:
 	clear_bit(__E1000_RESETTING, &adapter->state);
 	return retval;
 }