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

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

[Colin King]

From: Colin Ian King <colin.king-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>

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-Z7WLFzj8eWMS+FvcfC7Uqw@public.gmane.org>
---
 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

Re: [PATCH] crypto: mediatek: don't return garbage err on successful return

[Herbert Xu]

On Tue, Jan 03, 2017 at 01:21:22PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.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@canonical.com>

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt