[PATCH 2/2] vhost: search the packed vq driver area in RO areas

[Eugenio Pérez]

QEMU's shadow virtqueue and VDUSE exposes this as read-only. If we
don't change it, vhost_iova_to_vva do not consider them as valid and
returns that they're not found.

Fixes: 2d1541e2b6b3 ("vhost: add vring address setup for packed queues")
Cc: stable at dpdk.org

Signed-off-by: Eugenio Pérez <eperezma at redhat.com>
---
 lib/vhost/vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vhost/vhost.c b/lib/vhost/vhost.c
index 95a99bace6..a2e3e2635d 100644
--- a/lib/vhost/vhost.c
+++ b/lib/vhost/vhost.c
@@ -544,7 +544,7 @@ vring_translate_packed(struct virtio_net *dev, struct vhost_virtqueue *vq)
 	size = req_size;
 	vq->driver_event = (struct vring_packed_desc_event *)(uintptr_t)
 		vhost_iova_to_vva(dev, vq, vq->ring_addrs.avail_user_addr,
-				&size, VHOST_ACCESS_RW);
+				&size, VHOST_ACCESS_RO);
 	if (!vq->driver_event || size != req_size)
 		return -1;
 
-- 
2.49.0