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vhost: fix packed ring zero-copy

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Available buffer ID should be stored in the zmbuf in the packed-ring
dequeue path. There's no guarantee that local queue avail index is
equal to buffer ID.

Fixes: d1eafb532268 ("vhost: add packed ring zcopy batch and single dequeue")
Cc: stable@dpdk.org

Signed-off-by: Marvin Liu <yong.liu@intel.com>
Reported-by: Yinan Wang <yinan.wang@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Marvin Liu 2020-02-24 23:14:19 +08:00 committed by Ferruh Yigit
parent 39f59f37ee
commit 2a0ff4d554
1 changed files with 2 additions and 2 deletions
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4
lib/librte_vhost/virtio_net.c
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@ -2004,7 +2004,7 @@ virtio_dev_tx_batch_packed_zmbuf(struct virtio_net *dev,
vhost_for_each_try_unroll(i, 0, PACKED_BATCH_SIZE) {
zmbufs[i]->mbuf = pkts[i];
zmbufs[i]->desc_idx = avail_idx + i;
zmbufs[i]->desc_idx = ids[i];
zmbufs[i]->desc_count = 1;
}
@ -2045,7 +2045,7 @@ virtio_dev_tx_single_packed_zmbuf(struct virtio_net *dev,
return -1;
}
zmbuf->mbuf = *pkts;
zmbuf->desc_idx = vq->last_avail_idx;
zmbuf->desc_idx = buf_id;
zmbuf->desc_count = desc_count;
rte_mbuf_refcnt_update(*pkts, 1);