net/virtio: fix Tx desc cleanup for packed ring

We should try to cleanup at least the 'need' number of descs.

Fixes: 892dc798fa9c ("net/virtio: implement Tx path for packed queues")
Cc: stable@dpdk.org
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 4c701c5..b07ceac 100644 (file)
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -1943,7 +1943,6 @@ virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
 
                /* Positive value indicates it need free vring descriptors */
                if (unlikely(need > 0)) {
-                       need = RTE_MIN(need, (int)nb_pkts);
                        virtio_xmit_cleanup_packed(vq, need);
                        need = slots - vq->vq_free_cnt;
                        if (unlikely(need > 0)) {