Subject: [PATCH 1/2] virtio: fix net driver loop case where we fail to restart

From: Rusty Russell <rusty-8n+1lVoiYb80n/[email-masked]>
Date: Mon, 19 Nov 2007 11:20:15 +1100

skb is only NULL the first time around: it's more correct to test for
being under-budget.

Signed-off-by: Rusty Russell <rusty-8n+1lVoiYb80n/[email-masked]>

diff -r 2a94425ac7d5 drivers/net/virtio_net.c
--- a/drivers/net/virtio_net.c	Thu Nov 15 13:47:28 2007 +1100
+++ b/drivers/net/virtio_net.c	Thu Nov 15 23:10:44 2007 +1100
@@ -198,8 +198,8 @@ again:
 	if (vi->num < vi->max / 2)
 		try_fill_recv(vi);
 
-	/* All done? */
-	if (!skb) {
+	/* Out of packets? */
+	if (received < budget) {
 		netif_rx_complete(vi->dev, napi);
 		if (unlikely(!vi->rvq->vq_ops->restart(vi->rvq))
 		    && netif_rx_reschedule(vi->dev, napi))