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virtio-balloon: unref the iothread when unrealizing 

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

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
Fixes: c13c4153f7 ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Cc: qemu-stable@nongnu.org
Cc: Wei Wang <wei.w.wang@intel.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200520100439.19872-4-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 105aef9c94)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-4.2
David Hildenbrand 2020-05-20 12:04:39 +02:00 committed by Michael Roth
parent 2a7c80d82e
commit d6d45d9ed1
1 changed files with 1 additions and 0 deletions
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hw/virtio/virtio-balloon.c
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@ -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);
}