net/virtio-user: send kick notify backend on init

Acccording to the vhost-user spec [0], client must start ring
upon receiving a kick (that is, detecting that file descriptor
is reachable) on the descriptor specified by VHOST_USER_SET_VRING_KICK.

The code sends a kick to the rx queue. It is missing sending a
kick for the tx queue. This patch is to add the missing code to
comply with the spec.

[0]: https://fossies.org/linux/qemu/docs/specs/vhost-user.txt

Signed-off-by: Steven Luong <sluong@cisco.com>
Acked-by: Yuanhan Liu <yliu@fridaylinux.org>

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index e320811..c1b1640 100644 (file)
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -1754,6 +1754,11 @@ virtio_dev_start(struct rte_eth_dev *dev)
                virtqueue_notify(rxvq->vq);
        }
 
+       for (i = 0; i < dev->data->nb_tx_queues; i++) {
+               txvq = dev->data->tx_queues[i];
+               virtqueue_notify(txvq->vq);
+       }
+
        PMD_INIT_LOG(DEBUG, "Notified backend at initialization");
 
        for (i = 0; i < dev->data->nb_rx_queues; i++) {