From: Hui Tang <tanghu...@huawei.com>
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 <tanghu...@huawei.com>
Signed-off-by: Yang Shen <shenyan...@huawei.com>
Reviewed-by: Zhou Wang <wangzh...@hisilicon.com>
---
drivers/crypto/hisilicon/qm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 95a1b6c..b9bff96 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -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;
--
2.7.4
