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From: Yang Shen <shenyang39@huawei.com>
To: <herbert@gondor.apana.org.au>, <davem@davemloft.net>
Cc: <linux-crypto@vger.kernel.org>, <xuzaibo@huawei.com>,
	<wangzhou1@hisilicon.com>
Subject: [PATCH 4/9] crypto: hisilicon/qm - fix judgement of queue is full
Date: Mon, 29 Jun 2020 19:09:03 +0800
Message-ID: <1593428948-64634-5-git-send-email-shenyang39@huawei.com> (raw)
In-Reply-To: <1593428948-64634-1-git-send-email-shenyang39@huawei.com>

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(-)

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;
-- 
2.7.4


  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-29 11:08 [PATCH 0/9] crypto: hisilicon/qm - misc fixes Yang Shen
2020-06-29 11:09 ` [PATCH 1/9] crypto: hisilicon/qm - fix wrong release after using strsep Yang Shen
2020-07-01  7:01   ` shenyang (M)
2020-06-29 11:09 ` [PATCH 2/9] crypto: hisilicon/qm - clear used reference count when start qp Yang Shen
2020-06-29 11:09 ` [PATCH 3/9] crypto: hisilicon/qm - fix print frequence in hisi_qp_send Yang Shen
2020-06-29 11:09 ` Yang Shen [this message]
2020-06-29 11:09 ` [PATCH 5/9] crypto: hisilicon/qm - fix event queue depth to 2048 Yang Shen
2020-06-29 11:09 ` [PATCH 6/9] crypto: hisilicon/qm - fix no stop reason when use hisi_qm_stop Yang Shen
2020-06-29 11:09 ` [PATCH 7/9] crypto: hisilicon/qm - fix VF not available after PF FLR Yang Shen
2020-06-29 11:09 ` [PATCH 8/9] crypto: hisilicon/qm - fix the process of register algorithms to crypto Yang Shen
2020-06-29 11:09 ` [PATCH 9/9] crypto: hisilicon/qm - register callback function to 'pci_driver.shutdown' Yang Shen

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