ASC_MIN_FREE_Q
ASC_MIN_FREE_Q;
cur_used_qs = sc->cur_total_qng + ASC_MIN_FREE_Q;
(n_qs <= (sc->max_total_qng - ASC_MIN_FREE_Q))) {
#define ASC_MIN_TOTAL_QNG ((ASC_MAX_SG_QUEUE)+(ASC_MIN_FREE_Q))