Re: [PATCH 1/2] vhost: fix IOVA access for packed ring

We should apply for RO access when receiving packets from the
VM and apply for RW access when sending packets to the VM.

Fixes: a922401f35cc ("vhost: add Rx support for packed ring")
Fixes: ae999ce49dcb ("vhost: add Tx support for packed ring")
Cc: stable@dpdk.org

Signed-off-by: Tiwei Bie <redacted>
---
  lib/librte_vhost/virtio_net.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 8ad30c94a..5e1a1a727 100644
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c

@@ -598,7 +598,7 @@ reserve_avail_buf_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
  						avail_idx, &desc_count,
  						buf_vec, &vec_idx,
  						&buf_id, &len,
-						VHOST_ACCESS_RO) < 0))
+						VHOST_ACCESS_RW) < 0))
  			return -1;
  
  		len = RTE_MIN(len, size);

@@ -1503,7 +1503,7 @@ virtio_dev_tx_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
  						vq->last_avail_idx, &desc_count,
  						buf_vec, &nr_vec,
  						&buf_id, &dummy_len,
-						VHOST_ACCESS_RW) < 0))
+						VHOST_ACCESS_RO) < 0))
  			break;
  
  		if (likely(dev->dequeue_zero_copy == 0))