From: Jia Jie Ho <jiajie.ho@starfivetech.com>
Date: Mon, 29 Apr 2024 06:06:37 +0000 (+0800)
Subject: crypto: starfive - Skip dma setup for zeroed message
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3d12d90efadf689b05280ebbb3fca870298d218f;p=users%2Fhch%2Fblock.git

crypto: starfive - Skip dma setup for zeroed message

Skip dma setup and mapping for AES driver if plaintext is empty.

Signed-off-by: Jia Jie Ho <jiajie.ho@starfivetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---

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;