Received-SPF: pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Yang Shen <shenyang39@huawei.com>
To:     <herbert@gondor.apana.org.au>, <davem@davemloft.net>
CC:     <linux-kernel@vger.kernel.org>, <linux-crypto@vger.kernel.org>,
        <xuzaibo@huawei.com>, <wangzhou1@hisilicon.com>
Subject: [PATCH RESEND 3/4] crypto: hisilicon/zip - fix the return value when device is busy
Date:   Fri, 25 Sep 2020 22:06:16 +0800
Message-ID: <1601042777-26150-4-git-send-email-shenyang39@huawei.com>
In-Reply-To: <1601042777-26150-1-git-send-email-shenyang39@huawei.com>
References: <1601042777-26150-1-git-send-email-shenyang39@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

As before, when the ZIP device is too busy to creat a request, it will
return '-EBUSY'. But the crypto process think the '-EBUSY' means a
successful request and wait for its completion.

So replace '-EBUSY' with '-EAGAIN' to show crypto this request is failed.

Fixes: 62c455ca853e("crypto: hisilicon - add HiSilicon ZIP...")
Signed-off-by: Yang Shen <shenyang39@huawei.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
---
 drivers/crypto/hisilicon/zip/zip_crypto.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/hisilicon/zip/zip_crypto.c b/drivers/crypto/hisilicon/zip/zip_crypto.c
index 48dc2fd..08b4660 100644
--- a/drivers/crypto/hisilicon/zip/zip_crypto.c
+++ b/drivers/crypto/hisilicon/zip/zip_crypto.c
@@ -498,7 +498,7 @@ static struct hisi_zip_req *hisi_zip_create_req(struct acomp_req *req,
 	if (req_id >= req_q->size) {
 		write_unlock(&req_q->req_lock);
 		dev_dbg(&qp_ctx->qp->qm->pdev->dev, "req cache is full!\n");
-		return ERR_PTR(-EBUSY);
+		return ERR_PTR(-EAGAIN);
 	}
 	set_bit(req_id, req_q->req_bitmap);
 
@@ -564,6 +564,7 @@ static int hisi_zip_do_work(struct hisi_zip_req *req,
 	ret = hisi_qp_send(qp, &zip_sqe);
 	if (ret < 0) {
 		atomic64_inc(&dfx->send_busy_cnt);
+		ret = -EAGAIN;
 		dev_dbg_ratelimited(dev, "failed to send request!\n");
 		goto err_unmap_output;
 	}
-- 
2.7.4