[4/9] crypto: hisilicon/qm - fix judgement of queue is full

Message ID 1593428948-64634-5-git-send-email-shenyang39@huawei.com
State New
Headers show
Series
  • crypto: hisilicon/qm - misc fixes
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Commit Message

Yang Shen June 29, 2020, 11:09 a.m.
From: Hui Tang <tanghui20@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 <tanghui20@huawei.com>
Signed-off-by: Shukun Tan <tanshukun1@huawei.com>
---
 drivers/crypto/hisilicon/qm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Patch

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 095ebf0..93f443c 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -1655,7 +1655,7 @@  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;