ixgbe: Flush the LSC mask change to prevent repeated interrupts

Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ixgbe/ixgbe_main.c

@@ -1204,6 +1204,7 @@ static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
 	adapter->link_check_timeout = jiffies;
 	if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
 		IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
+		IXGBE_WRITE_FLUSH(hw);
 		schedule_work(&adapter->watchdog_task);
 	}
 }