linux-kernel - Re: [PATCH] sky2: receive dma mapping error handling

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Message-id: <4B66192F.9040103@majjas.com>
Date:	Sun, 31 Jan 2010 18:58:39 -0500
From:	Michael Breuer <mbreuer@...jas.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	David Miller <davem@...emloft.net>, akpm@...ux-foundation.org,
	flyboy@...il.com, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, Michael Chan <mchan@...adcom.com>,
	Don Fry <pcnet32@...izon.net>,
	Francois Romieu <romieu@...zoreil.com>,
	Matt Carlson <mcarlson@...adcom.com>
Subject: Re: [PATCH] sky2:  receive dma mapping error handling

On 1/31/2010 5:25 PM, Jarek Poplawski wrote:
> On Sat, Jan 30, 2010 at 11:17:41PM -0500, Michael Breuer wrote:
>    
>> On 01/30/2010 07:34 PM, Jarek Poplawski wrote:
>>      
>>> On Sat, Jan 30, 2010 at 11:31:48AM -0500, Michael Breuer wrote:
>>>        
>>>> Jan 29 17:13:11 mail kernel: sky2 eth0: rx error, status 0x6230010
>>>> length 1518
>>>> Jan 29 17:13:11 mail kernel: sky2 eth0: rx error, status 0x7f40010
>>>> length 1518
>>>>          
>>> These are length errors, but status shows more than 1518, e.g. 2036
>>> here, unless I miss something. Please, don't use jumbo frames in your
>>> network until we fully debug it for regular frames (Stephen admitted
>>> sky2 jumbo might be broken).
>>>        
>> MTU was 1500 - not using jumbo frames as they don't work.
>>      
> Do you mean no NIC in your network could have sent such frames?
>
> Jarek P.
>    
Well... There's only one possible source... and if there were it would 
have been a Win7 bug :) Regardless, sky2 shouldn't be sensitive to rogue 
external network stuff.
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