[PATCH] crypto: rockchip - Fix dma_unmap_sg() nents value

[Thomas Fourier]

The dma_unmap_sg() functions should be called with the same nents as the
dma_map_sg(), not the value the map function returned.

Fixes: 57d67c6e8219 ("crypto: rockchip - rework by using crypto_engine")
Cc: <stable at vger.kernel.org>
Signed-off-by: Thomas Fourier <fourier.thomas at gmail.com>
---
 drivers/crypto/rockchip/rk3288_crypto_ahash.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
index d6928ebe9526..b9f5a8b42e66 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
@@ -254,7 +254,7 @@ static void rk_hash_unprepare(struct crypto_engine *engine, void *breq)
 	struct rk_ahash_rctx *rctx = ahash_request_ctx(areq);
 	struct rk_crypto_info *rkc = rctx->dev;
 
-	dma_unmap_sg(rkc->dev, areq->src, rctx->nrsg, DMA_TO_DEVICE);
+	dma_unmap_sg(rkc->dev, areq->src, sg_nents(areq->src), DMA_TO_DEVICE);
 }
 
 static int rk_hash_run(struct crypto_engine *engine, void *breq)
-- 
2.43.0