netdev - Re: [PATCH] e100: Don't enable WoL by default on Toshiba devices

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Message-ID: <1421335864.2632.29.camel@jtkirshe-mobl>
Date:	Thu, 15 Jan 2015 07:31:04 -0800
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Ondrej Zary <linux@...nbow-software.org>
Cc:	David Miller <davem@...emloft.net>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] e100: Don't enable WoL by default on Toshiba devices

On Thu, 2015-01-15 at 16:18 +0100, Ondrej Zary wrote:
> On Thursday 15 January 2015, Jeff Kirsher wrote:
> > On Thu, 2015-01-15 at 14:40 +0100, Ondrej Zary wrote:
> > > On Thursday 13 November 2014, Jeff Kirsher wrote:
> > > > On Wed, 2014-11-12 at 18:18 -0500, David Miller wrote:
> > > > > From: Ondrej Zary <linux@...nbow-software.org>
> > > > > Date: Wed, 12 Nov 2014 23:47:25 +0100
> > > > >
> > > > > > Enabling WoL on some Toshiba laptops (such as Portege R100)
> > >
> > > causes
> > >
> > > > > > battery drain after shutdown (WoL is active even on battery).
> > >
> > > These
> > >
> > > > > > laptops have the WoL bit set in EEPROM ID, causing e100 driver
> > >
> > > to
> > >
> > > > > > enable WoL by default.
> > > > > >
> > > > > > Check subsystem vendor ID and if it's Toshiba, don't enable WoL
> > >
> > > by
> > >
> > > > > > default from EEPROM settings.
> > > > > >
> > > > > > Fixes
> > >
> > > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/110784
> > >
> > > > > > Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
> > > > >
> > > > > Jeff, are you gonna pick this up?
> > > >
> > > > Yes, sorry I did not catch it earlier.
> > >
> > > What happened to this patch? I don't see it in net.git or
> > > net-next.git
> > > (checked both davem's and jkirsher's)
> >
> > Sorry, I thought I had replied with a NAK on this patch after further
> > review of the changes.
> >
> > We don't fix BIOS issues in the driver especially regarding feature
> > enablement like WoL.  We would end up with dozens of these kinds of fixes
> > if we to allow this.
> >
> > You should go back to the OEM and ask for a BIOS update to resolve this or
> > configure udev so that ethtool disables WoL.
> 
> This is not a BIOS bug. When the machine is powered off in BIOS (or GRUB), 
> everything is OK.
> 
> The bug is that e100 driver enables WoL based on some bit in EEPROM that 
> happens to be set on at least some Toshiba laptops and user has no way to 
> change it.

Yes, the EEPROM can be modified/updated through the BIOS update I
suggested earlier.  So again, a BIOS issue.

OR you can configure udev so that ethtool disables WoL if you do not
want to pursue a EEPROM update through a BIOS update.

>  Windows driver does not do this. Other Linux ethernet drivers 
> don't do this. When user wants WoL, (s)he enables it in BIOS and OS. Maybe 
> this (mis)feature should be removed from the driver.
> 



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