linux-kernel - Re: [PATCH 09/26] atl1: refactor tx processing

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Message-ID: <47995115.9090903@garzik.org>
Date:	Thu, 24 Jan 2008 22:01:41 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Jay Cliburn <jacliburn@...lsouth.net>
CC:	csnook@...hat.com, linux-kernel@...r.kernel.org,
	atl1-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: Re: [PATCH 09/26] atl1: refactor tx processing

Jay Cliburn wrote:
> On Tue, 22 Jan 2008 18:31:09 -0600
> Jay Cliburn <jacliburn@...lsouth.net> wrote:
> 
>> On Tue, 22 Jan 2008 04:58:17 -0500
>> Jeff Garzik <jeff@...zik.org> wrote:
>>
> [...]
>>> for such a huge patch, this description is very tiny.  [describe]
>>> what is refactored, and why.
> 
> Is this one any better?
> 
> 
> 
>>>From df475e2eea401f9dc18ca23dab538b99fb9e710c Mon Sep 17 00:00:00 2001
> From: Jay Cliburn <jacliburn@...lsouth.net>
> Date: Wed, 23 Jan 2008 21:36:36 -0600
> Subject: [PATCH] atl1: simplify tx packet descriptor
> 
> The transmit packet descriptor consists of four 32-bit words, with word 3
> upper bits overloaded depending upon the condition of its bits 3 and 4.
> The driver currently duplicates all word 2 and some word 3 register bit
> definitions unnecessarily and also uses a set of nested structures in its
> definition of the TPD without good cause. This patch adds a lengthy
> comment describing the TPD, eliminates duplicate TPD bit definitions,
> and simplifies the TPD structure itself. It also expands the TSO check
> to correctly handle custom checksum versus TSO processing using the revised
> TPD definitions. Finally, shorten some variable names in the transmit
> processing path to reduce line lengths, rename some variables to better
> describe their purpose (e.g., nseg versus m), and add a comment or two
> to better describe what the code is doing.
> 
> Signed-off-by: Jay Cliburn <jacliburn@...lsouth.net>
> ---
>  drivers/net/atlx/atl1.c |  265 +++++++++++++++++++++++++----------------------
>  drivers/net/atlx/atl1.h |  201 +++++++++++++++++++-----------------
>  2 files changed, 246 insertions(+), 220 deletions(-)

Yep, better.

	Jeff



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