From 901e65fa6ccbadeacd6c585cf49a0a7cdafb4737 Mon Sep 17 00:00:00 2001
From: Julia Suvorova <jusual@redhat.com>
Date: Wed, 19 Feb 2020 21:34:29 +0000
Subject: [PATCH 5/7] virtio: make virtio_delete_queue idempotent

RH-Author: Julia Suvorova <jusual@redhat.com>
Message-id: <20200219213431.11913-3-jusual@redhat.com>
Patchwork-id: 93981
O-Subject: [RHEL-AV-8.2.0 qemu-kvm PATCH 2/4] virtio: make virtio_delete_queue idempotent
Bugzilla: 1791590
RH-Acked-by: Danilo de Paula <ddepaula@redhat.com>
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Michael S. Tsirkin <mst@redhat.com>

From: "Michael S. Tsirkin" <mst@redhat.com>

Let's make sure calling this twice is harmless -
no known instances, but seems safer.

Suggested-by: Pan Nengyuan <pannengyuan@huawei.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 8cd353ea0fbf0e334e015d833f612799be642296)
Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
---
 hw/virtio/virtio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index d63a369..e6a9ba4 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2342,6 +2342,7 @@ void virtio_delete_queue(VirtQueue *vq)
     vq->handle_output = NULL;
     vq->handle_aio_output = NULL;
     g_free(vq->used_elems);
+    vq->used_elems = NULL;
 }
 
 void virtio_del_queue(VirtIODevice *vdev, int n)
-- 
1.8.3.1