From: Yang Shen <shenyang39@xxxxxxxxxx>
If an error occurs in the process after the SGL is mapped
successfully, it need to unmap the SGL.
Otherwise, memory problems may occur.
Signed-off-by: Yang Shen <shenyang39@xxxxxxxxxx>
Signed-off-by: Chenghai Huang <huangchenghai2@xxxxxxxxxx>
---
drivers/crypto/hisilicon/sgl.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/hisilicon/sgl.c b/drivers/crypto/hisilicon/sgl.c
index 568acd0aee3f..c974f95cd126 100644
--- a/drivers/crypto/hisilicon/sgl.c
+++ b/drivers/crypto/hisilicon/sgl.c
@@ -225,7 +225,7 @@ hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
dma_addr_t curr_sgl_dma = 0;
struct acc_hw_sge *curr_hw_sge;
struct scatterlist *sg;
- int sg_n;
+ int sg_n, ret;
if (!dev || !sgl || !pool || !hw_sgl_dma || index >= pool->count)
return ERR_PTR(-EINVAL);
@@ -240,14 +240,15 @@ hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
if (sg_n_mapped > pool->sge_nr) {
dev_err(dev, "the number of entries in input scatterlist is bigger than SGL pool setting.\n");
- return ERR_PTR(-EINVAL);
+ ret = -EINVAL;
+ goto err_unmap;
}
curr_hw_sgl = acc_get_sgl(pool, index, &curr_sgl_dma);
if (IS_ERR(curr_hw_sgl)) {
dev_err(dev, "Get SGL error!\n");
- dma_unmap_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
- return ERR_PTR(-ENOMEM);
+ ret = -ENOMEM;
+ goto err_unmap;
}
curr_hw_sgl->entry_length_in_sgl = cpu_to_le16(pool->sge_nr);
curr_hw_sge = curr_hw_sgl->sge_entries;
@@ -262,6 +263,11 @@ hisi_acc_sg_buf_map_to_hw_sgl(struct device *dev,
*hw_sgl_dma = curr_sgl_dma;
return curr_hw_sgl;
+
+err_unmap:
+ dma_unmap_sg(dev, sgl, sg_n, DMA_BIDIRECTIONAL);
+
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(hisi_acc_sg_buf_map_to_hw_sgl);
--
2.33.0
