tgt_cmnd_queue(cmnd->tc, scsi_cmnd_done);
proto->queue_cmnd(cmnd->tc, scsi_cmnd_done);
static void scsi_cmnd_exec(struct iscsi_cmnd *cmnd){	if (cmnd->r2t_length) {		if (!cmnd->is_unsolicited_data)			send_r2t(cmnd);	} else {		set_cmnd_waitio(cmnd);		cmnd->tc->private = cmnd;		tgt_cmnd_queue(cmnd->tc, scsi_cmnd_done);	}}