blk_set_aio_context is audited by perm API, so follow the protocol and
request for permission first.

Signed-off-by: Fam Zheng <famz@redhat.com>
---
 hw/scsi/virtio-scsi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 1dbc4bc..6a48356 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -811,6 +811,10 @@ static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
             return;
         }
         virtio_scsi_acquire(s);
+        if (!blk_request_perm(sd->conf.blk, BLK_PERM_AIO_CONTEXT_CHANGE, errp)) {
+            virtio_scsi_release(s);
+            return;
+        }
         blk_set_aio_context(sd->conf.blk, s->ctx);
         virtio_scsi_release(s);
 
-- 
2.9.3