[PATCH 2/2] crypto: hisilicon - Matching the dma address for dma_pool_free()

[Yunfeng Ye]

When dma_pool_zalloc() fail in sec_alloc_and_fill_hw_sgl(),
dma_pool_free() is invoked, but the parameters that sgl_current and
sgl_current->next_sgl is not match.

Using sec_free_hw_sgl() instead of the original free routine.

Fixes: 915e4e8413da ("crypto: hisilicon - SEC security accelerator driver")
Signed-off-by: Yunfeng Ye <yeyunf...@huawei.com>
---
 drivers/crypto/hisilicon/sec/sec_algs.c | 44 +++++++++++--------------
 1 file changed, 19 insertions(+), 25 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c 
b/drivers/crypto/hisilicon/sec/sec_algs.c
index 8c789b8671fc..331a682415d1 100644
--- a/drivers/crypto/hisilicon/sec/sec_algs.c
+++ b/drivers/crypto/hisilicon/sec/sec_algs.c
@@ -153,6 +153,24 @@ static void sec_alg_skcipher_init_context(struct 
crypto_skcipher *atfm,
                                       ctx->cipher_alg);
 }

+static void sec_free_hw_sgl(struct sec_hw_sgl *hw_sgl,
+                           dma_addr_t psec_sgl, struct sec_dev_info *info)
+{
+       struct sec_hw_sgl *sgl_current, *sgl_next;
+       dma_addr_t sgl_next_dma;
+
+       sgl_current = hw_sgl;
+       while (sgl_current) {
+               sgl_next = sgl_current->next;
+               sgl_next_dma = sgl_current->next_sgl;
+
+               dma_pool_free(info->hw_sgl_pool, sgl_current, psec_sgl);
+
+               sgl_current = sgl_next;
+               psec_sgl = sgl_next_dma;
+       }
+}
+
 static int sec_alloc_and_fill_hw_sgl(struct sec_hw_sgl **sec_sgl,
                                     dma_addr_t *psec_sgl,
                                     struct scatterlist *sgl,
@@ -199,36 +217,12 @@ static int sec_alloc_and_fill_hw_sgl(struct sec_hw_sgl 
**sec_sgl,
        return 0;

 err_free_hw_sgls:
-       sgl_current = *sec_sgl;
-       while (sgl_current) {
-               sgl_next = sgl_current->next;
-               dma_pool_free(info->hw_sgl_pool, sgl_current,
-                             sgl_current->next_sgl);
-               sgl_current = sgl_next;
-       }
+       sec_free_hw_sgl(*sec_sgl, *psec_sgl, info);
        *psec_sgl = 0;

        return ret;
 }

-static void sec_free_hw_sgl(struct sec_hw_sgl *hw_sgl,
-                           dma_addr_t psec_sgl, struct sec_dev_info *info)
-{
-       struct sec_hw_sgl *sgl_current, *sgl_next;
-       dma_addr_t sgl_next_dma;
-
-       sgl_current = hw_sgl;
-       while (sgl_current) {
-               sgl_next = sgl_current->next;
-               sgl_next_dma = sgl_current->next_sgl;
-
-               dma_pool_free(info->hw_sgl_pool, sgl_current, psec_sgl);
-
-               sgl_current = sgl_next;
-               psec_sgl = sgl_next_dma;
-       }
-}
-
 static int sec_alg_skcipher_setkey(struct crypto_skcipher *tfm,
                                   const u8 *key, unsigned int keylen,
                                   enum sec_cipher_alg alg)
-- 
2.23.0