Merge branch 'upstream-davem' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index e66de0c12fc1..fdc23678117b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -302,10 +302,12 @@ static int virtnet_open(struct net_device *dev)
 
         /* If all buffers were filled by other side before we napi_enabled, we
          * won't get another interrupt, so process any outstanding packets
-         * now.  virtnet_poll wants re-enable the queue, so we disable here. */
-        vi->rvq->vq_ops->disable_cb(vi->rvq);
-        netif_rx_schedule(vi->dev, &vi->napi);
-
+         * now.  virtnet_poll wants re-enable the queue, so we disable here.
+         * We synchronize against interrupts via NAPI_STATE_SCHED */
+        if (netif_rx_schedule_prep(dev, &vi->napi)) {
+                vi->rvq->vq_ops->disable_cb(vi->rvq);
+                __netif_rx_schedule(dev, &vi->napi);
+        }
         return 0;
 }