linux-kernel - [PATCH] crypto: hisilicon/qm - restore original qos values

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Message-ID: <20251018112739.3220154-1-huangchenghai2@huawei.com>
Date: Sat, 18 Oct 2025 19:27:39 +0800
From: Chenghai Huang <huangchenghai2@...wei.com>
To: <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC: <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
	<linuxarm@...neuler.org>, <liulongfang@...wei.com>, <qianweili@...wei.com>,
	<wangzhou1@...ilicon.com>, <fanghao11@...wei.com>, <nieweiqiang@...wei.com>
Subject: [PATCH] crypto: hisilicon/qm - restore original qos values

From: nieweiqiang <nieweiqiang@...wei.com>

When the new qos valus setting fails, restore to
the original qos values.

Fixes: 72b010dc33b9 ("crypto: hisilicon/qm - supports writing QoS int the host")
Signed-off-by: nieweiqiang <nieweiqiang@...wei.com>
Signed-off-by: Chenghai Huang <huangchenghai2@...wei.com>
---
 drivers/crypto/hisilicon/qm.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c
index a5b96adf2d1e..30e44cfb57ee 100644
--- a/drivers/crypto/hisilicon/qm.c
+++ b/drivers/crypto/hisilicon/qm.c
@@ -3678,6 +3678,7 @@ static void qm_clear_vft_config(struct hisi_qm *qm)
 static int qm_func_shaper_enable(struct hisi_qm *qm, u32 fun_index, u32 qos)
 {
 	struct device *dev = &qm->pdev->dev;
+	struct qm_shaper_factor t_factor;
 	u32 ir = qos * QM_QOS_RATE;
 	int ret, total_vfs, i;
 
@@ -3685,6 +3686,7 @@ static int qm_func_shaper_enable(struct hisi_qm *qm, u32 fun_index, u32 qos)
 	if (fun_index > total_vfs)
 		return -EINVAL;
 
+	memcpy(&t_factor, &qm->factor[fun_index], sizeof(t_factor));
 	qm->factor[fun_index].func_qos = qos;
 
 	ret = qm_get_shaper_para(ir, &qm->factor[fun_index]);
@@ -3698,11 +3700,21 @@ static int qm_func_shaper_enable(struct hisi_qm *qm, u32 fun_index, u32 qos)
 		ret = qm_set_vft_common(qm, SHAPER_VFT, fun_index, i, 1);
 		if (ret) {
 			dev_err(dev, "type: %d, failed to set shaper vft!\n", i);
-			return -EINVAL;
+			goto back_func_qos;
 		}
 	}
 
 	return 0;
+
+back_func_qos:
+	memcpy(&qm->factor[fun_index], &t_factor, sizeof(t_factor));
+	for (i--; i >= ALG_TYPE_0; i--) {
+		ret = qm_set_vft_common(qm, SHAPER_VFT, fun_index, i, 1);
+		if (ret)
+			dev_err(dev, "failed to restore shaper vft during rollback!\n");
+	}
+
+	return -EINVAL;
 }
 
 static u32 qm_get_shaper_vft_qos(struct hisi_qm *qm, u32 fun_index)
-- 
2.33.0