crypto: hisilicon/sgl - fix the sg buf unmap

Add data cleared operation for sge data.
Signed-off-by: NKai Ye <yekai13@huawei.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

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;