[PATCH] crypto: sun8i-ss - Fix error codes for dma_mapping_error()

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If there is a dma_mapping_error() then return negative error codes.
Currently this code returns success.

Fixes: 801b7d572c0a ("crypto: sun8i-ss - add hmac(sha1)")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index ac417a6b39e5..845019bd9591 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -586,7 +586,8 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
 			rctx->t_dst[k + 1].len = rctx->t_dst[k].len;
 		}
 		addr_xpad = dma_map_single(ss->dev, tfmctx->ipad, bs, DMA_TO_DEVICE);
-		if (dma_mapping_error(ss->dev, addr_xpad)) {
+		err = dma_mapping_error(ss->dev, addr_xpad);
+		if (err) {
 			dev_err(ss->dev, "Fail to create DMA mapping of ipad\n");
 			goto err_dma_xpad;
 		}
@@ -612,7 +613,8 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
 			goto err_dma_result;
 		}
 		addr_xpad = dma_map_single(ss->dev, tfmctx->opad, bs, DMA_TO_DEVICE);
-		if (dma_mapping_error(ss->dev, addr_xpad)) {
+		err = dma_mapping_error(ss->dev, addr_xpad);
+		if (err) {
 			dev_err(ss->dev, "Fail to create DMA mapping of opad\n");
 			goto err_dma_xpad;
 		}
-- 
2.35.1




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