[PATCH] e100: Synchronize interface link state with poll routine

Synchronize interface link state with e100 poll routine
Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Ganesh Venkatesan <ganesh.venkatesan@intel.com>
Signed-off-by: John Ronciak <john.ronciak@intel.com>

drivers/net/e100.c

@@ -1743,8 +1743,11 @@ static int e100_up(struct nic *nic)
 	if((err = request_irq(nic->pdev->irq, e100_intr, SA_SHIRQ,
 		nic->netdev->name, nic->netdev)))
 		goto err_no_irq;
-	e100_enable_irq(nic);
 	netif_wake_queue(nic->netdev);
+	netif_poll_enable(nic->netdev);
+	/* enable ints _after_ enabling poll, preventing a race between
+	 * disable ints+schedule */
+	e100_enable_irq(nic);
 	return 0;
 
 err_no_irq:
@@ -1758,11 +1761,13 @@ static int e100_up(struct nic *nic)
 
 static void e100_down(struct nic *nic)
 {
+	/* wait here for poll to complete */
+	netif_poll_disable(nic->netdev);
+	netif_stop_queue(nic->netdev);
 	e100_hw_reset(nic);
 	free_irq(nic->pdev->irq, nic->netdev);
 	del_timer_sync(&nic->watchdog);
 	netif_carrier_off(nic->netdev);
-	netif_stop_queue(nic->netdev);
 	e100_clean_cbs(nic);
 	e100_rx_clean_list(nic);
 }