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

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Message-ID: <20191108123416.GA732985@kroah.com>
Date:   Fri, 8 Nov 2019 13:34:16 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Julian Wiedmann <jwi@...ux.ibm.com>
Cc:     Sasha Levin <sashal@...nel.org>, 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 Fri, Nov 08, 2019 at 01:16:26PM +0100, Julian Wiedmann wrote:
> 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.
> 

I cant see centos backporting anything unless they were asked to do so.
And this really looks like a "bugfix" to me, why isn't this relevant for
any older kernel versions?

thanks,

greg k-h