[PULL 03/25] virtio: Free blk virqueues at unrealize()

["Michael S. Tsirkin" <mst@redhat.com>]

From: Eugenio Pérez <eperezma@redhat.com>

The function virtio_del_queue was not called at unrealize() callback.

This was detected due to add an allocated element on the vq introduce
in future commits (used_elems) and running address sanitizer memory
leak detector.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20191025083527.30803-4-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/block/virtio-blk.c | 5 +++++
 1 file changed, 5 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);
-- 
MST