linux-kernel - [PATCH] crypto: mediatek: don't return garbage err on successful return

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Message-Id: <20170103132122.26900-1-colin.king@canonical.com>
Date:   Tue,  3 Jan 2017 13:21:22 +0000
From:   Colin King <colin.king@...onical.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: mediatek: don't return garbage err on successful return

From: Colin Ian King <colin.king@...onical.com>

In the case where keylen <= bs mtk_sha_setkey returns an uninitialized
return value in err.  Fix this by returning 0 instead of err.

Issue detected by static analysis with cppcheck.

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/crypto/mediatek/mtk-sha.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/mediatek/mtk-sha.c b/drivers/crypto/mediatek/mtk-sha.c
index 8951363..8e1b440 100644
--- a/drivers/crypto/mediatek/mtk-sha.c
+++ b/drivers/crypto/mediatek/mtk-sha.c
@@ -878,7 +878,7 @@ static int mtk_sha_setkey(struct crypto_ahash *tfm,
 		bctx->opad[i] ^= 0x5c;
 	}
 
-	return err;
+	return 0;
 }
 
 static int mtk_sha_export(struct ahash_request *req, void *out)
-- 
2.10.2