From: David Hildenbrand <da...@redhat.com>

We took a reference when realizing, so let's drop that reference when
unrealizing.

Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com>
Reviewed-by: Alexander Duyck <alexander.h.du...@linux.intel.com>
Fixes: c13c4153f76d ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Cc: qemu-sta...@nongnu.org
Cc: Wei Wang <wei.w.w...@intel.com>
Cc: Alexander Duyck <alexander.du...@gmail.com>
Cc: Michael S. Tsirkin <m...@redhat.com>
Cc: Philippe Mathieu-Daudé <phi...@redhat.com>
Signed-off-by: David Hildenbrand <da...@redhat.com>
Message-Id: <20200520100439.19872-4-da...@redhat.com>
Reviewed-by: Michael S. Tsirkin <m...@redhat.com>
Signed-off-by: Michael S. Tsirkin <m...@redhat.com>
(cherry picked from commit 105aef9c9479786d27c1c45c9b0b1fa03dc46be3)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
 hw/virtio/virtio-balloon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index 64fdd0e332..9762a65600 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -820,6 +820,7 @@ static void virtio_balloon_device_unrealize(DeviceState 
*dev, Error **errp)
 
     if (s->free_page_bh) {
         qemu_bh_delete(s->free_page_bh);
+        object_unref(OBJECT(s->iothread));
         virtio_balloon_free_page_stop(s);
         precopy_remove_notifier(&s->free_page_report_notify);
     }
-- 
2.17.1


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