Received-SPF: pass (google.com: best guess record for domain of linux-crypto-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
To:     Herbert Xu <herbert@gondor.apana.org.au>, <davem@davemloft.net>,
        <catalin.marinas@arm.com>, <will@kernel.org>,
        <ard.biesheuvel@linaro.org>, <linux-crypto@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <hushiyuan@huawei.com>,
        "linfeilong@huawei.com" <linfeilong@huawei.com>
From:   Yunfeng Ye <yeyunfeng@huawei.com>
Subject: [PATCH v3] crypto: arm64/aes-neonbs - add return value of
 skcipher_walk_done() in __xts_crypt()
Message-ID: <aaf0f585-3a06-8af1-e2f1-ab301e560d49@huawei.com>
Date:   Tue, 22 Oct 2019 16:11:18 +0800
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:60.0) Gecko/20100101
 Thunderbird/60.6.1
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-crypto-owner@vger.kernel.org
Precedence: bulk

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@huawei.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
v2 -> v3:
 - add "Acked-by:"

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