1 files changed, 19 insertions, 3 deletions

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 19fd4cb0ddf8..b58472cf76f8 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -203,8 +203,11 @@ again:
         if (received < budget) {
                 netif_rx_complete(vi->dev, napi);
                 if (unlikely(!vi->rvq->vq_ops->enable_cb(vi->rvq))
-                    && netif_rx_reschedule(vi->dev, napi))
+                    && napi_schedule_prep(napi)) {
+                        vi->rvq->vq_ops->disable_cb(vi->rvq);
+                        __netif_rx_schedule(vi->dev, napi);
                         goto again;
+                }
         }
 
         return received;
@@ -278,10 +281,11 @@ again:
                 pr_debug("%s: virtio not prepared to send\n", dev->name);
                 netif_stop_queue(dev);
 
-                /* Activate callback for using skbs: if this fails it
+                /* Activate callback for using skbs: if this returns false it
                  * means some were used in the meantime. */
                 if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
-                        printk("Unlikely: restart svq failed\n");
+                        printk("Unlikely: restart svq race\n");
+                        vi->svq->vq_ops->disable_cb(vi->svq);
                         netif_start_queue(dev);
                         goto again;
                 }
@@ -294,6 +298,15 @@ again:
         return 0;
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void virtnet_netpoll(struct net_device *dev)
+{
+        struct virtnet_info *vi = netdev_priv(dev);
+
+        napi_schedule(&vi->napi);
+}
+#endif
+
 static int virtnet_open(struct net_device *dev)
 {
         struct virtnet_info *vi = netdev_priv(dev);
@@ -336,6 +349,9 @@ static int virtnet_probe(struct virtio_device *vdev)
         dev->stop = virtnet_close;
         dev->hard_start_xmit = start_xmit;
         dev->features = NETIF_F_HIGHDMA;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+        dev->poll_controller = virtnet_netpoll;
+#endif
         SET_NETDEV_DEV(dev, &vdev->dev);
 
         /* Do we support "hardware" checksums? */