vhost: enable rings at the right time

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

diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
index bcfd28f..3b934a7 100644 (file)
--- a/lib/librte_vhost/vhost_user.c
+++ b/lib/librte_vhost/vhost_user.c
@@ -699,6 +699,15 @@ vhost_user_set_vring_kick(struct virtio_net *dev, struct VhostUserMsg *pmsg)
                "vring kick idx:%d file:%d\n", file.index, file.fd);
 
        vq = dev->virtqueue[file.index];
+
+       /*
+        * When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
+        * the ring starts already enabled. Otherwise, it is enabled via
+        * the SET_VRING_ENABLE message.
+        */
+       if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES)))
+               vq->enabled = 1;
+
        if (vq->kickfd >= 0)
                close(vq->kickfd);
        vq->kickfd = file.fd;