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virtio: use zeroed memory for simple Tx header

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For simple TX the virtio-net header must be zeroed, but it was using memory
that had been initialized with indirect descriptor tables. This resulted in
"unsupported gso type" errors from librte_vhost.

We can use the same memory for every descriptor to save cachelines in the
vswitch.

Fixes: 6dc5de3a ("virtio: use indirect ring elements")

Signed-off-by: Rich Lane <rich.lane@bigswitch.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
This commit is contained in:
Rich Lane 2016-04-04 19:11:01 -07:00 committed by Thomas Monjalon
parent 71dc571efd
commit 610e0a8b62
1 changed files with 1 additions and 1 deletions
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2
drivers/net/virtio/virtio_rxtx.c
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@ -377,7 +377,7 @@ virtio_dev_vring_start(struct virtqueue *vq, int queue_type)
vq->vq_ring.desc[i + mid_idx].next = i;
vq->vq_ring.desc[i + mid_idx].addr =
vq->virtio_net_hdr_mem +
i * vq->hw->vtnet_hdr_size;
offsetof(struct virtio_tx_region, tx_hdr);
vq->vq_ring.desc[i + mid_idx].len =
vq->hw->vtnet_hdr_size;
vq->vq_ring.desc[i + mid_idx].flags =