[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>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/net/e100.c b/drivers/net/e100.c
index 2c8c14ebf205..c1ca2dae7c48 100644
--- a/drivers/net/e100.c
+++ b/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 @@ err_rx_clean_list:
 
 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);
 }