linux-kernel - Re: [PATCH AUTOSEL 4.19 204/205] s390/qeth: limit csum offload erratum to L3 devices

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Message-Id: <4d8f1938-af6e-7e0e-4085-2f7c53390b2d@linux.ibm.com>
Date:   Fri, 8 Nov 2019 13:16:26 +0100
From:   Julian Wiedmann <jwi@...ux.ibm.com>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        "David S . Miller" <davem@...emloft.net>,
        linux-s390@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19 204/205] s390/qeth: limit csum offload
 erratum to L3 devices

On 08.11.19 13:00, Sasha Levin wrote:
> On Fri, Nov 08, 2019 at 12:50:24PM +0100, Julian Wiedmann wrote:
>> On 08.11.19 12:37, Sasha Levin wrote:
>>> From: Julian Wiedmann <jwi@...ux.ibm.com>
>>>
>>> [ Upstream commit f231dc9dbd789b0f98a15941e3cebedb4ad72ad5 ]
>>>
>>> Combined L3+L4 csum offload is only required for some L3 HW. So for
>>> L2 devices, don't offload the IP header csum calculation.
>>>
>>
>> NACK, this has no relevance for stable.
> 
> Sure, I'll drop it.
> 
> Do you have an idea why the centos and ubuntu folks might have
> backported this commit into their kernels?
> 

No clue, I trust they have their own reasons.