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virtio: fix descriptors pointing to the same buffer

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The virtio_net_hdr desc all pointed to the same buffer. It doesn't cause
issue because in the simple TX mode we don't use the header. This patch
makes the header desc point to different buffer.

Fixes: b4ae9c505f ("virtio: optimize ring layout")

Signed-off-by: Huawei Xie <huawei.xie@intel.com>
Acked-by: Jianfeng Tan <jianfeng.tan@intel.com>
Acked-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
This commit is contained in:
Huawei Xie 2015-12-11 00:07:32 +08:00 committed by Thomas Monjalon
parent c680a4a88c
commit 3b1e3e4e36
1 changed files with 1 additions and 1 deletions
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2
drivers/net/virtio/virtio_rxtx.c
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@ -353,7 +353,7 @@ 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 +
mid_idx * vq->hw->vtnet_hdr_size;
i * vq->hw->vtnet_hdr_size;
vq->vq_ring.desc[i + mid_idx].len =
vq->hw->vtnet_hdr_size;
vq->vq_ring.desc[i + mid_idx].flags =