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From:   Kai Ye <yekai13@huawei.com>
To:     <herbert@gondor.apana.org.au>
CC:     <linux-crypto@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <wangzhou1@hisilicon.com>, <yekai13@huawei.com>
Subject: [PATCH v2 5/5] crypto: hisilicon/sgl - fix the sg buf unmap
Date:   Tue, 30 Mar 2021 15:39:06 +0800
Message-ID: <1617089946-48078-6-git-send-email-yekai13@huawei.com>
In-Reply-To: <1617089946-48078-1-git-send-email-yekai13@huawei.com>
References: <1617089946-48078-1-git-send-email-yekai13@huawei.com>
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Add clear data operation for sge data.

Signed-off-by: Kai Ye <yekai13@huawei.com>
---
 drivers/crypto/hisilicon/sgl.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/hisilicon/sgl.c b/drivers/crypto/hisilicon/sgl.c
index c618aaf..7a58ab3 100644
--- a/drivers/crypto/hisilicon/sgl.c
+++ b/drivers/crypto/hisilicon/sgl.c
@@ -189,6 +189,18 @@ static void update_hw_sgl_sum_sge(struct hisi_acc_hw_sgl *hw_sgl, u16 sum)
 	hw_sgl->entry_sum_in_chain = cpu_to_le16(sum);
 }
 
+static void clear_hw_sgl_sge(struct hisi_acc_hw_sgl *hw_sgl)
+{
+	struct acc_hw_sge *hw_sge = hw_sgl->sge_entries;
+	int i;
+
+	for (i = 0; i < hw_sgl->entry_sum_in_sgl; i++) {
+		hw_sge[i].page_ctrl = NULL;
+		hw_sge[i].buf = 0;
+		hw_sge[i].len = 0;
+	}
+}
+
 /**
  * hisi_acc_sg_buf_map_to_hw_sgl - Map a scatterlist to a hw sgl.
  * @dev: The device which hw sgl belongs to.
@@ -266,7 +278,7 @@ void hisi_acc_sg_buf_unmap(struct device *dev, struct scatterlist *sgl,
 		return;
 
 	dma_unmap_sg(dev, sgl, sg_nents(sgl), DMA_BIDIRECTIONAL);
-
+	clear_hw_sgl_sge(hw_sgl);
 	hw_sgl->entry_sum_in_chain = 0;
 	hw_sgl->entry_sum_in_sgl = 0;
 	hw_sgl->entry_length_in_sgl = 0;
-- 
2.8.1