static void vhost_scsi_flush(struct vhost_scsi *vs)
{
	struct vhost_scsi_inflight *old_inflight[VHOST_SCSI_MAX_VQ];
	int i;

	/* Init new inflight and remember the old inflight */
	vhost_scsi_init_inflight(vs, old_inflight);

	/*
	 * The inflight->kref was initialized to 1. We decrement it here to
	 * indicate the start of the flush operation so that it will reach 0
	 * when all the reqs are finished.
	 */
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		kref_put(&old_inflight[i]->kref, vhost_scsi_done_inflight);

	/* Flush both the vhost poll and vhost work */
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		vhost_scsi_flush_vq(vs, i);
	vhost_work_flush(&vs->dev, &vs->vs_completion_work);
	vhost_work_flush(&vs->dev, &vs->vs_event_work);

	/* Wait for all reqs issued before the flush to be finished */
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		wait_for_completion(&old_inflight[i]->comp);
}
static void vhost_scsi_flush(struct vhost_scsi *vs)
{
	struct vhost_scsi_inflight *old_inflight[VHOST_SCSI_MAX_VQ];
	int i;

	 
	vhost_scsi_init_inflight(vs, old_inflight);

	 
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		kref_put(&old_inflight[i]->kref, vhost_scsi_done_inflight);

	 
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		vhost_scsi_flush_vq(vs, i);
	vhost_work_flush(&vs->dev, &vs->vs_completion_work);
	vhost_work_flush(&vs->dev, &vs->vs_event_work);

	 
	for (i = 0; i < VHOST_SCSI_MAX_VQ; i++)
		wait_for_completion(&old_inflight[i]->comp);
}