linux-kernel - [PATCH] crypto: hisilicon/qm - add device status check when start fails

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Message-ID: <20221119095003.10802-1-qianweili@huawei.com>
Date:   Sat, 19 Nov 2022 17:50:03 +0800
From:   Weili Qian <qianweili@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <liulongfang@...wei.com>
Subject: [PATCH] crypto: hisilicon/qm - add device status check when start fails

In function 'hisi_qm_resume', if the device fails to be started,
directly returning error code will cause the device to be unavailable.
However, the failure may be caused by device error, which will be
reported to the driver, and driver can reset and restart device.
Therefore, check device status instead of returning error code
directly. Returns 0 if device error has occurred, otherwise returns
error code.

Signed-off-by: Weili Qian <qianweili@...wei.com>
---
 drivers/crypto/hisilicon/qm.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index 9072bee7336f..007ac7a69ce7 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -5468,8 +5468,14 @@ int hisi_qm_resume(struct device *dev)
 	}
 
 	ret = hisi_qm_start(qm);
-	if (ret)
-		pci_err(pdev, "failed to start qm(%d)\n", ret);
+	if (ret) {
+		if (qm_check_dev_error(qm)) {
+			pci_info(pdev, "failed to start qm due to device error, device will be reset!\n");
+			return 0;
+		}
+
+		pci_err(pdev, "failed to start qm(%d)!\n", ret);
+	}
 
 	return ret;
 }
-- 
2.33.0