[Qemu-devel] [PATCH for-2.5 1/1] vhost-user: do not send SET_VRING_ENABLE at start

[Thibaut Collet]

This patch reverts partially commit 3a12f32229a.

In case of live migration several queues can be enabled and not only the first
one. So inform backend that only the first queue is enabled is wrong.

Since commit 7263a0ad7899 backend is already notified of the state of the vring
through the vring attach operation. This function, called during the startup
sequence, provides the correct state of the vring, even in case of live
migration.

So nothing has to be added to give the vring state to the backend at the 
startup.

Signed-off-by: Thibaut Collet <address@hidden>
---
 hw/virtio/vhost.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 1794f0d..870cd12 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1226,11 +1226,6 @@ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice 
*vdev)
         }
     }
 
-    if (hdev->vhost_ops->vhost_set_vring_enable) {
-        /* only enable first vq pair by default */
-        hdev->vhost_ops->vhost_set_vring_enable(hdev, hdev->vq_index == 0);
-    }
-
     return 0;
 fail_log:
     vhost_log_put(hdev, false);
-- 
2.1.4