vhost: enforce desc flags and content read ordering

[dpdk.git] / lib / librte_vhost / virtio_net.c

diff --git a/lib/librte_vhost/virtio_net.c b/lib/librte_vhost/virtio_net.c
index 7f37bbb..a9b1bc5 100644 (file)
--- a/lib/librte_vhost/virtio_net.c
+++ b/lib/librte_vhost/virtio_net.c
@@ -481,6 +481,12 @@ fill_vec_buf_packed(struct virtio_net *dev, struct vhost_virtqueue *vq,
        if (unlikely(!desc_is_avail(&descs[avail_idx], wrap_counter)))
                return -1;
 
+       /*
+        * The ordering between desc flags and desc
+        * content reads need to be enforced.
+        */
+       rte_smp_rmb();
+
        *desc_count = 0;
        *len = 0;