linux-kernel - Re: v4.15-rc2 on thinkpad x60: ethernet stopped working

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Date:   Fri, 15 Dec 2017 20:04:51 +0100
From:   Pavel Machek <pavel@....cz>
To:     "Keller, Jacob E" <jacob.e.keller@...el.com>
Cc:     Gabriel C <nix.or.die@...il.com>,
        kernel list <linux-kernel@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
Subject: Re: v4.15-rc2 on thinkpad x60: ethernet stopped working

Hi!

> > > > Any ideas ?
> > >
> > > Yes , 19110cfbb34d4af0cdfe14cd243f3b09dc95b013 broke it.
> > >
> > > See:
> > > https://bugzilla.kernel.org/show_bug.cgi?id=198047
> > >
> > > Fix there :
> > > https://marc.info/?l=linux-kernel&m=151272209903675&w=2
> > >
> > > Regards,
> > >
> > > Gabriel C
> > 
> > Hi,
> > 
> > Digging into this, the problem is complicated. The original bug assumed behavior
> > of the .check_for_link call, which is universally not implemented.
> > 
> > I think the correct fix is to revert 19110cfbb34d ("e1000e: Separate signaling for
> > link check/link up", 2017-10-10) and find a more proper solution.
> > 
> > I don't think any other code which uses check_for_link expects the interface to
> > return in the way this patch attempted.

> Alternatively, we can go a step farther and make sure every implementation of .check_for_link follows the modified interface.
> 

We are at -rc3 now. Reverting 19110cfbb34d seems like good solution at
the moment.
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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