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net/virtio: replace full barrier with relaxed ones for Arm

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Relax the full write barriers to one-way barriers for virtio
control path for Arm platform

Signed-off-by: Joyce Kong <joyce.kong@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Joyce Kong 2020-12-21 22:23:20 +08:00 committed by Ferruh Yigit
parent f1b9cf07d3
commit e51a474ced
1 changed files with 2 additions and 2 deletions
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4
drivers/net/virtio/virtio_ethdev.c
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@ -203,8 +203,8 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
}
virtio_wmb(vq->hw->weak_barriers);
desc[head].flags = VRING_DESC_F_NEXT | flags;
virtqueue_store_flags_packed(&desc[head], VRING_DESC_F_NEXT | flags,
vq->hw->weak_barriers);
virtio_wmb(vq->hw->weak_barriers);
virtqueue_notify(vq);