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net/virtio: fix slots number when indirect feature on

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Virtio driver only occupies one slot for enqueuing chained mbufs when
indirect feature is on. Required slots calculation should depend on
indirect feature status at the end.

Fixes: 0eaf7fc2fe ("net/virtio: separate AVX Rx/Tx")
Cc: stable@dpdk.org

Signed-off-by: Marvin Liu <yong.liu@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Marvin Liu 2022-01-20 20:22:18 +08:00 committed by Maxime Coquelin
parent 8b764f460f
commit 787091b9d5
1 changed files with 1 additions and 2 deletions
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3
drivers/net/virtio/virtio_rxtx_packed.h
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@ -125,13 +125,12 @@ virtqueue_enqueue_single_packed_vec(struct virtnet_tx *txvq,
* any_layout => number of segments
* default => number of segments + 1
*/
slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
can_push = rte_mbuf_refcnt_read(txm) == 1 &&
RTE_MBUF_DIRECT(txm) &&
txm->nb_segs == 1 &&
rte_pktmbuf_headroom(txm) >= hdr_size;
slots = txm->nb_segs + !can_push;
slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
need = slots - vq->vq_free_cnt;
/* Positive value indicates it need free vring descriptors */