qm: fix packet loss for acc

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

In this patch, we try to change depth of qm_get_avail_sqe.
For hardware qm, 1023 sqe is full. When sqe reaches 1024, qm sqe
tail equal to head, which will be treated as empty queue, causing
packet loss.
Signed-off-by: NYu'an Wang <wangyuan46@huawei.com>
Reviewed-by: NMingqiang Ling <lingmingqiang@huawei.com>
Reviewed-by: NGuangwei Zhou <zhouguangwei5@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/crypto/hisilicon/qm.c

@@ -1244,7 +1244,7 @@ static void *qm_get_avail_sqe(struct hisi_qp *qp)
 	struct hisi_qp_status *qp_status = &qp->qp_status;
 	u16 sq_tail = qp_status->sq_tail;
 
-	if (unlikely(atomic_read(&qp->qp_status.used) == QM_Q_DEPTH))
+	if (unlikely(atomic_read(&qp->qp_status.used) == QM_Q_DEPTH - 1))
 		return NULL;
 
 	return qp->sqe + sq_tail * qp->qm->sqe_size;