From: Yuri Benditovich <yuri.benditovich@daynix.com>

https://bugzilla.redhat.com/show_bug.cgi?id=1708480
If the control queue is not deleted together with TX/RX, it
later will be ignored in freeing cache resources and hot
unplug will not be completed.

Cc: qemu-stable@nongnu.org
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
Message-Id: <20191226043649.14481-3-yuri.benditovich@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit d945d9f1731244ef341f74ede93120fc9de35913)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/net/virtio-net.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index db3d7c38e6..f325440d01 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -3101,7 +3101,8 @@ static void virtio_net_device_unrealize(DeviceState *dev, Error **errp)
     for (i = 0; i < max_queues; i++) {
         virtio_net_del_queue(n, i);
     }
-
+    /* delete also control vq */
+    virtio_del_queue(vdev, max_queues * 2);
     qemu_announce_timer_del(&n->announce_timer, false);
     g_free(n->vqs);
     qemu_del_nic(n->nic);
-- 
2.17.1