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net/virtio: fix avail descriptor ID

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Vhost will update desc’s Buffer ID advance to next used descriptor when
VIRTIO_F_IN_ORDER feature negotiated. When virtio reuses the descriptor,
the Buffer ID should be restored even VIRTQ_DESC_F_INDIRECT
feature negotiated.

Fixes: b473061b0e ("net/virtio: fix indirect descriptors in packed datapaths")
Cc: stable@dpdk.org

Signed-off-by: Xuan Ding <xuan.ding@intel.com>
Signed-off-by: Yong Liu <yong.liu@intel.com>
Signed-off-by: Miao Li <miao.li@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Xuan Ding 2021-10-21 14:25:40 +00:00 committed by Maxime Coquelin
parent 028f06e8be
commit ad6f01945a
1 changed files with 3 additions and 0 deletions
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3
drivers/net/virtio/virtqueue.h
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@ -732,6 +732,9 @@ virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
RTE_PTR_DIFF(&txr[idx].tx_packed_indir, txr);
start_dp[idx].len = (seg_num + 1) *
sizeof(struct vring_packed_desc);
/* Packed descriptor id needs to be restored when inorder. */
if (in_order)
start_dp[idx].id = idx;
/* reset flags for indirect desc */
head_flags = VRING_DESC_F_INDIRECT;
head_flags |= vq->vq_packed.cached_flags;