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From: Jia Jie Ho <jiajie.ho@starfivetech.com>
To: Herbert Xu <herbert@gondor.apana.org.au>,
	"David S . Miller" <davem@davemloft.net>,
	linux-crypto@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH -next 1/4] crypto: starfive - Skip dma setup for zeroed message
Date: Mon, 29 Apr 2024 14:06:37 +0800
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Skip dma setup and mapping for AES driver if plaintext is empty.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
---
 drivers/crypto/starfive/jh7110-aes.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/crypto/starfive/jh7110-aes.c b/drivers/crypto/starfive/jh7110-aes.c
index 72b7d46150d5..9d6e2f936f03 100644
--- a/drivers/crypto/starfive/jh7110-aes.c
+++ b/drivers/crypto/starfive/jh7110-aes.c
@@ -590,12 +590,16 @@ static int starfive_aes_do_one_req(struct crypto_engine *engine, void *areq)
 	if (ret)
 		return ret;
 
+	if (!cryp->total_in)
+		goto finish_req;
+
 	starfive_aes_dma_init(cryp);
 
 	ret = starfive_aes_map_sg(cryp, rctx->in_sg, rctx->out_sg);
 	if (ret)
 		return ret;
 
+finish_req:
 	starfive_aes_finish_req(ctx);
 
 	return 0;
-- 
2.40.1