linux-kernel - [PATCH 1/3] crypto: sun8i-ce - fix nents passed to dma_unmap

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Message-ID: <20250519151350.3442981-1-ovidiu.panait.oss@gmail.com>
Date: Mon, 19 May 2025 18:13:48 +0300
From: Ovidiu Panait <ovidiu.panait.oss@...il.com>
To: clabbe.montjoie@...il.com,
	herbert@...dor.apana.org.au,
	davem@...emloft.net,
	linux-crypto@...r.kernel.org
Cc: wens@...e.org,
	jernej.skrabec@...il.com,
	samuel@...lland.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Ovidiu Panait <ovidiu.panait.oss@...il.com>
Subject: [PATCH 1/3] crypto: sun8i-ce - fix nents passed to dma_unmap_sg()

In sun8i_ce_cipher_unprepare(), dma_unmap_sg() is incorrectly called with
the number of entries returned by dma_map_sg(), rather than using the
original number of entries passed when mapping the scatterlist.

To fix this, stash the original number of entries passed to dma_map_sg()
in the request context.

Fixes: 0605fa0f7826 ("crypto: sun8i-ce - split into prepare/run/unprepare")
Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@...il.com>
---
 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
index f9cf00d690e2..7cd3b13f3bdc 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
@@ -278,8 +278,8 @@ static int sun8i_ce_cipher_prepare(struct crypto_engine *engine, void *async_req
 	}
 
 	chan->timeout = areq->cryptlen;
-	rctx->nr_sgs = nr_sgs;
-	rctx->nr_sgd = nr_sgd;
+	rctx->nr_sgs = ns;
+	rctx->nr_sgd = nd;
 	return 0;
 
 theend_sgs:
-- 
2.48.1