[PATCH v6 3/9] virtio: Free rng and blk virqueues

["Eugenio Pérez" <eperezma@redhat.com>]

The function virtio_del_queue was not called at these devices
unrealize() callbacks.

This was detected due to add an allocated element on the next commit
(used_elems) and running address sanitizer memory leak detector.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
 hw/block/virtio-blk.c  | 5 +++++
 hw/virtio/virtio-rng.c | 1 +
 2 files changed, 6 insertions(+)

diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index ed2ddebd2b..ba846fe9dc 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -1206,9 +1206,14 @@ static void virtio_blk_device_unrealize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIOBlock *s = VIRTIO_BLK(dev);
+    VirtIOBlkConf *conf = &s->conf;
+    unsigned i;
 
     virtio_blk_data_plane_destroy(s->dataplane);
     s->dataplane = NULL;
+    for (i = 0; i < conf->num_queues; i++) {
+        virtio_del_queue(vdev, i);
+    }
     qemu_del_vm_change_state_handler(s->change);
     blockdev_mark_auto_del(s->blk);
     virtio_cleanup(vdev);
diff --git a/hw/virtio/virtio-rng.c b/hw/virtio/virtio-rng.c
index e93bed020f..b498a20332 100644
--- a/hw/virtio/virtio-rng.c
+++ b/hw/virtio/virtio-rng.c
@@ -238,6 +238,7 @@ static void virtio_rng_device_unrealize(DeviceState *dev, Error **errp)
     qemu_del_vm_change_state_handler(vrng->vmstate);
     timer_del(vrng->rate_limit_timer);
     timer_free(vrng->rate_limit_timer);
+    virtio_del_queue(vdev, 0);
     virtio_cleanup(vdev);
 }
 
-- 
2.16.5