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crypto: hisilicon/qm - fix judgement of queue is full

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The queue depth is 1024, so the condition for judging the queue full
should be 1023, otherwise the hardware cannot judge whether the queue
is empty or full.

Fixes: 263c9959c937("crypto: hisilicon - add queue management driver...")
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Hui Tang
2020-08-15 17:56:11 +08:00
committed by Herbert Xu
parent 7e655e196c
commit 71d1ca4987
1 changed files with 1 additions and 1 deletions
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drivers/crypto/hisilicon/qm.c
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@@ -1647,7 +1647,7 @@ 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;