linux-kernel - Re: [PATCH 1/3] crypto: tcrypt - Fix the wrong position of return value test statement

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Date:   Thu, 12 Aug 2021 16:59:43 +0300
From:   Vitaly Chikunov <vt@...linux.org>
To:     Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Biggers <ebiggers@...gle.com>,
        Eric Biggers <ebiggers@...nel.org>,
        Gilad Ben-Yossef <gilad@...yossef.com>,
        Ard Biesheuvel <ardb@...nel.org>, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jia Zhang <zhang.jia@...ux.alibaba.com>,
        "YiLin . Li" <YiLin.Li@...ux.alibaba.com>
Subject: Re: [PATCH 1/3] crypto: tcrypt - Fix the wrong position of return
 value test statement

Tianjia,

On Thu, Aug 12, 2021 at 09:17:46PM +0800, Tianjia Zhang wrote:
> The position of the return value test statement of crypto_aead_setkey()
> is wrong, adjust to make it work properly.

This commit message does not explain anything. It's nearly equivalent to
"fix".

> 
> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
> ---
>  crypto/tcrypt.c | 13 ++++++-------
>  1 file changed, 6 insertions(+), 7 deletions(-)
> 
> diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
> index d73a42fdaa9b..73c97e085baf 100644
> --- a/crypto/tcrypt.c
> +++ b/crypto/tcrypt.c
> @@ -612,6 +612,12 @@ static void test_aead_speed(const char *algo, int enc, unsigned int secs,
>  				}
>  			}
>  			ret = crypto_aead_setkey(tfm, key, *keysize);

Perhaps, you would say that return value of crypto_aead_setkey was lost.

> +			if (ret) {
> +				pr_err("setkey() failed flags=%x\n",
> +						crypto_aead_get_flags(tfm));
> +				goto out;
> +			}
> +
>  			ret = crypto_aead_setauthsize(tfm, authsize);

But, isn't now return value of crypto_aead_setauthsize is lost?

Thanks,

>  
>  			iv_len = crypto_aead_ivsize(tfm);
> @@ -622,15 +628,8 @@ static void test_aead_speed(const char *algo, int enc, unsigned int secs,
>  			printk(KERN_INFO "test %u (%d bit key, %d byte blocks): ",
>  					i, *keysize * 8, bs);
>  
> -
>  			memset(tvmem[0], 0xff, PAGE_SIZE);
>  
> -			if (ret) {
> -				pr_err("setkey() failed flags=%x\n",
> -						crypto_aead_get_flags(tfm));
> -				goto out;
> -			}
> -
>  			sg_init_aead(sg, xbuf, bs + (enc ? 0 : authsize),
>  				     assoc, aad_size);
>  
> -- 
> 2.19.1.3.ge56e4f7