linux-kernel - [PATCH v2] crypto: arm64/aes-neonbs - add return value of skcipher_walk_done() in __xts

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Date:   Tue, 22 Oct 2019 15:28:11 +0800
From:   Yunfeng Ye <yeyunfeng@...wei.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>, <davem@...emloft.net>,
        <catalin.marinas@....com>, <will@...nel.org>,
        <ard.biesheuvel@...aro.org>
CC:     <linux-crypto@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <hushiyuan@...wei.com>,
        <linfeilong@...wei.com>
Subject: [PATCH v2] crypto: arm64/aes-neonbs - add return value of
 skcipher_walk_done() in __xts_crypt()

A warning is found by the static code analysis tool:
  "Identical condition 'err', second condition is always false"

Fix this by adding return value of skcipher_walk_done().

Fixes: 67cfa5d3b721 ("crypto: arm64/aes-neonbs - implement ciphertext stealing for XTS")
Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
---
v1 -> v2:
 - update the subject and comment
 - add return value of skcipher_walk_done()

 arch/arm64/crypto/aes-neonbs-glue.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/crypto/aes-neonbs-glue.c b/arch/arm64/crypto/aes-neonbs-glue.c
index ea873b8904c4..e3e27349a9fe 100644
--- a/arch/arm64/crypto/aes-neonbs-glue.c
+++ b/arch/arm64/crypto/aes-neonbs-glue.c
@@ -384,7 +384,7 @@ static int __xts_crypt(struct skcipher_request *req, bool encrypt,
 			goto xts_tail;

 		kernel_neon_end();
-		skcipher_walk_done(&walk, nbytes);
+		err = skcipher_walk_done(&walk, nbytes);
 	}

 	if (err || likely(!tail))
-- 
2.7.4.3