linux-kernel - [PATCH 2/4] crypto: rk3288 - use API helpers to setup fallback request

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Message-ID: <20250407123604.2109561-2-ovidiu.panait.oss@gmail.com>
Date: Mon,  7 Apr 2025 15:36:02 +0300
From: Ovidiu Panait <ovidiu.panait.oss@...il.com>
To: linux-crypto@...r.kernel.org,
	herbert@...dor.apana.org.au
Cc: davem@...emloft.net,
	linux-kernel@...r.kernel.org,
	Ovidiu Panait <ovidiu.panait.oss@...il.com>,
	Corentin Labbe <clabbe@...libre.com>,
	Heiko Stuebner <heiko@...ech.de>,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org
Subject: [PATCH 2/4] crypto: rk3288 - use API helpers to setup fallback request

Rather than setting up the fallback request by hand, use
ahash_request_set_callback() and ahash_request_set_crypt() API helpers
to properly setup the new request.

This also ensures that the completion callback is properly passed down
to the fallback algorithm, which avoids a crash with async fallbacks.

Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@...il.com>
---
Cc: Corentin Labbe <clabbe@...libre.com>
Cc: Heiko Stuebner <heiko@...ech.de>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-rockchip@...ts.infradead.org

 drivers/crypto/rockchip/rk3288_crypto_ahash.c | 52 ++++++++++---------
 1 file changed, 27 insertions(+), 25 deletions(-)

diff --git a/drivers/crypto/rockchip/rk3288_crypto_ahash.c b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
index 69d6019d8abc..d6928ebe9526 100644
--- a/drivers/crypto/rockchip/rk3288_crypto_ahash.c
+++ b/drivers/crypto/rockchip/rk3288_crypto_ahash.c
@@ -52,12 +52,11 @@ static int rk_ahash_digest_fb(struct ahash_request *areq)
 	algt->stat_fb++;
 
 	ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
-	rctx->fallback_req.base.flags = areq->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
-
-	rctx->fallback_req.nbytes = areq->nbytes;
-	rctx->fallback_req.src = areq->src;
-	rctx->fallback_req.result = areq->result;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   areq->base.complete, areq->base.data);
+	ahash_request_set_crypt(&rctx->fallback_req, areq->src, areq->result,
+				areq->nbytes);
 
 	return crypto_ahash_digest(&rctx->fallback_req);
 }
@@ -124,8 +123,9 @@ static int rk_ahash_init(struct ahash_request *req)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
 
 	return crypto_ahash_init(&rctx->fallback_req);
 }
@@ -137,10 +137,10 @@ static int rk_ahash_update(struct ahash_request *req)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
-	rctx->fallback_req.nbytes = req->nbytes;
-	rctx->fallback_req.src = req->src;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
+	ahash_request_set_crypt(&rctx->fallback_req, req->src, NULL, req->nbytes);
 
 	return crypto_ahash_update(&rctx->fallback_req);
 }
@@ -152,9 +152,10 @@ static int rk_ahash_final(struct ahash_request *req)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
-	rctx->fallback_req.result = req->result;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
+	ahash_request_set_crypt(&rctx->fallback_req, NULL, req->result, 0);
 
 	return crypto_ahash_final(&rctx->fallback_req);
 }
@@ -166,12 +167,11 @@ static int rk_ahash_finup(struct ahash_request *req)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
-
-	rctx->fallback_req.nbytes = req->nbytes;
-	rctx->fallback_req.src = req->src;
-	rctx->fallback_req.result = req->result;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
+	ahash_request_set_crypt(&rctx->fallback_req, req->src, req->result,
+				req->nbytes);
 
 	return crypto_ahash_finup(&rctx->fallback_req);
 }
@@ -183,8 +183,9 @@ static int rk_ahash_import(struct ahash_request *req, const void *in)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
 
 	return crypto_ahash_import(&rctx->fallback_req, in);
 }
@@ -196,8 +197,9 @@ static int rk_ahash_export(struct ahash_request *req, void *out)
 	struct rk_ahash_ctx *ctx = crypto_ahash_ctx(tfm);
 
 	ahash_request_set_tfm(&rctx->fallback_req, ctx->fallback_tfm);
-	rctx->fallback_req.base.flags = req->base.flags &
-					CRYPTO_TFM_REQ_MAY_SLEEP;
+	ahash_request_set_callback(&rctx->fallback_req,
+				   req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP,
+				   req->base.complete, req->base.data);
 
 	return crypto_ahash_export(&rctx->fallback_req, out);
 }
-- 
2.48.1