virtio: fix net driver loop case where we fail to restart
skb is only NULL the first time around: it's more correct to test for
being under-budget.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index d74e6f4..5413dbf 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -198,8 +198,8 @@
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))
