linux-kernel - [PATCH v3 5/5] crypto: hisilicon/sgl

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Date:   Fri, 9 Apr 2021 17:04:04 +0800
From:   Kai Ye <yekai13@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yekai13@...wei.com>
Subject: [PATCH v3 5/5] crypto: hisilicon/sgl - fix the sg buf unmap

Add data cleared operation for sge data.

Signed-off-by: Kai Ye <yekai13@...wei.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 7f11e41..0572737 100644
--- a/drivers/crypto/hisilicon/sgl.c
+++ b/drivers/crypto/hisilicon/sgl.c
@@ -192,6 +192,18 @@ 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 < le16_to_cpu(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.
@@ -269,7 +281,7 @@ 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