[PATCH 2/7] crypto: hisilicon/hpre - remove dma_free_coherent on NULL req->dst in ECDH

[Weili Qian]

In hpre_ecdh_hw_data_clr_all(), req->dst is always NULL because
hpre_ecdh_dst_data_init() sets hpre_req->dst = NULL before mapping
the user buffer with dma_map_single(). The dma_free_coherent() call
on req->dst is therefore dead code. Remove it.

Fixes: 05e7b906aa7c ("crypto: hisilicon/hpre - add 'ECDH' algorithm")
Signed-off-by: Weili Qian <qianweili@xxxxxxxxxx>
---
 drivers/crypto/hisilicon/hpre/hpre_crypto.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 7894211b9972..8551d6ccb78d 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -1407,8 +1407,6 @@ static void hpre_ecdh_hw_data_clr_all(struct hpre_ctx *ctx,
 	if (unlikely(dma_mapping_error(dev, dma)))
 		return;
 
-	if (req->dst)
-		dma_free_coherent(dev, ctx->key_sz << 1, req->dst, dma);
 	if (dst)
 		dma_unmap_single(dev, dma, ctx->key_sz << 1, DMA_FROM_DEVICE);
 }
-- 
2.43.0