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From:   Gilad Ben-Yossef <gilad@benyossef.com>
Date:   Wed, 2 Oct 2019 13:00:25 +0300
Message-ID: <CAOtvUMeaRp08Go7BqdPzOaTFQKLOUTXMZfUE5pTpUNk3vM649A@mail.gmail.com>
Subject: Re: [PATCH] crypto: fix comparison of unsigned expression warnings
To:     Tian Tao <tiantao6@huawei.com>
Cc:     Herbert Xu <herbert@gondor.apana.org.au>,
        David Miller <davem@davemloft.net>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        linuxarm@huawei.com
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Hi,


On Mon, Sep 30, 2019 at 11:52 AM Tian Tao <tiantao6@huawei.com> wrote:
>
> This patch fixes the following warnings:
> drivers/crypto/ccree/cc_aead.c:630:5-12: WARNING: Unsigned expression
> compared with zero: seq_len > 0
>

Thanks for the report!

Can you please share which compiler/arch/config you use that produces
this warning?

I'm not seeing it on my end.

Many thanks,
Gilad

> Signed-off-by: Tian Tao <tiantao6@huawei.com>
> ---
>  drivers/crypto/ccree/cc_aead.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aea=
d.c
> index d3e8faa..b19291d 100644
> --- a/drivers/crypto/ccree/cc_aead.c
> +++ b/drivers/crypto/ccree/cc_aead.c
> @@ -546,7 +546,7 @@ static int cc_aead_setkey(struct crypto_aead *tfm, co=
nst u8 *key,
>         struct cc_aead_ctx *ctx =3D crypto_aead_ctx(tfm);
>         struct cc_crypto_req cc_req =3D {};
>         struct cc_hw_desc desc[MAX_AEAD_SETKEY_SEQ];
> -       unsigned int seq_len =3D 0;
> +       int seq_len =3D 0;
>         struct device *dev =3D drvdata_to_dev(ctx->drvdata);
>         const u8 *enckey, *authkey;
>         int rc;
> --
> 2.7.4
>


--=20
Gilad Ben-Yossef
Chief Coffee Drinker

values of =CE=B2 will give rise to dom!