net/virtio: fix Rx AltiVec path by getting all packets

The loop to read packets does not take all packets as the number of
available packets (nb_used) is decremented in the loop.

Fixes: 52b5a707e6ca ("net/virtio: add Altivec Rx")

Signed-off-by: David Christensen <drc@linux.vnet.ibm.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_rxtx_simple_altivec.c b/drivers/net/virtio/virtio_rxtx_simple_altivec.c
index f856396..47225f4 100644 (file)
--- a/drivers/net/virtio/virtio_rxtx_simple_altivec.c
+++ b/drivers/net/virtio/virtio_rxtx_simple_altivec.c
@@ -44,7 +44,7 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
        struct virtnet_rx *rxvq = rx_queue;
        struct virtqueue *vq = rxvq->vq;
        struct virtio_hw *hw = vq->hw;
-       uint16_t nb_used;
+       uint16_t nb_used, nb_total;
        uint16_t desc_idx;
        struct vring_used_elem *rused;
        struct rte_mbuf **sw_ring;
@@ -109,9 +109,10 @@ virtio_recv_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
                        virtqueue_notify(vq);
        }
 
+       nb_total = nb_used;
        ref_rx_pkts = rx_pkts;
        for (nb_pkts_received = 0;
-               nb_pkts_received < nb_used;) {
+               nb_pkts_received < nb_total;) {
                vector unsigned char desc[RTE_VIRTIO_DESC_PER_LOOP / 2];
                vector unsigned char mbp[RTE_VIRTIO_DESC_PER_LOOP / 2];
                vector unsigned char pkt_mb[RTE_VIRTIO_DESC_PER_LOOP];