linux-kernel - Re: [PATCH 8/8] staging: ccree: remove BUG macro usage

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Date:   Thu, 7 Sep 2017 12:00:14 +0300
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        driverdev-devel@...uxdriverproject.org, devel@...verdev.osuosl.org,
        Linux kernel mailing list <linux-kernel@...r.kernel.org>,
        Ofir Drang <ofir.drang@....com>
Subject: Re: [PATCH 8/8] staging: ccree: remove BUG macro usage

On Wed, Sep 6, 2017 at 10:28 PM, Dan Carpenter <dan.carpenter@...cle.com> wrote:
> On Sun, Sep 03, 2017 at 11:56:50AM +0300, Gilad Ben-Yossef wrote:
>> @@ -1154,7 +1150,8 @@ static inline int ssi_buffer_mgr_aead_chain_data(
>>               //if have reached the end of the sgl, then this is unexpected
>>               if (!areq_ctx->src_sgl) {
>>                       SSI_LOG_ERR("reached end of sg list. unexpected\n");
>> -                     BUG();
>> +                     return -EINVAL;
>> +                     goto chain_data_exit;
>
> You've got a direct return followed by a goto.

Yes, that is silly. Thank you for spotting that.

>
> It's a do-nothing goto that just returns rc.  I hate those.  I've tried
> to review locking bugs to see if single returns prevent future
> programmers from introducing new error paths which don't unlock.  They
> don't really help...


I've replaced the error handling from goto to return as you suggested
for the changes
introduced by this patch.

Still need to clean up a lot of the other code doing this though.

Gilad




-- 
Gilad Ben-Yossef
Chief Coffee Drinker

"If you take a class in large-scale robotics, can you end up in a
situation where the homework eats your dog?"
 -- Jean-Baptiste Queru