linux-kernel - Re: [PATCH 3/3 v2] netxen: qlogic ethernet : Fix endian bug.

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Message-ID: <CAOD=uF6=2b-s_ErZ8zB+Mmo=gzE8wJdQ+h=TPz7U-sc1ucyw=Q@mail.gmail.com>
Date:	Mon, 12 Mar 2012 12:22:05 +0530
From:	santosh prasad nayak <santoshprasadnayak@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	sony.chacko@...gic.com, rajesh.borundia@...gic.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 3/3 v2] netxen: qlogic ethernet : Fix endian bug.

Sure David.
I will resend it with proper comment.

Regards
Santosh

On Mon, Mar 12, 2012 at 12:18 PM, David Miller <davem@...emloft.net> wrote:
> From: santosh nayak <santoshprasadnayak@...il.com>
> Date: Mon, 12 Mar 2012 12:08:23 +0530
>
>> From: Santosh Nayak <santoshprasadnayak@...il.com>
>>
>> Fix endian bug.
>>
>> Signed-off-by: Santosh Nayak <santoshprasadnayak@...il.com>
>
> This is a very non-trivial patch, therefore the terse commit
> message and the lack of any comments in this code is unacceptable.
>
> This commit message is not only terse, it's wrong.  You're not
> fixing an endian bug, you're fixing several of them.
>
> Explain everything in your commit message.
>
>>       req.words[0] = cpu_to_le64(cmd);
>> -     req.words[1] = cpu_to_le64(ip);
>> +     memcpy(&req.words[1], &ip, sizeof(u32));
>
> Nobody is going to read that and have any idea why it's correct unless
> they happen to be able to discover the long thread you guys had this
> past week working out how to do this change correctly.
>
> Putting a comment here for the rest of us mere mortals is therefore
> absolutely required.
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