netdev - Re: linux-next: Tree for July 18: sky2 WOL broken

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Message-Id: <200807210253.34533.rjw@sisk.pl>
Date:	Mon, 21 Jul 2008 02:53:33 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>, netdev@...r.kernel.org,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>,
	David Miller <davem@...emloft.net>
Subject: Re: linux-next: Tree for July 18: sky2 WOL broken

On Sunday, 20 of July 2008, Rafael J. Wysocki wrote:
> On Sunday, 20 of July 2008, Stephen Hemminger wrote:
> > On Sun, 20 Jul 2008 02:20:10 +0200
> > "Rafael J. Wysocki" <rjw@...k.pl> wrote:
> > 
> > > On Friday, 18 of July 2008, Stephen Rothwell wrote:
> > > > Hi all,
> > > > 
> > > > Changes since next-20080717:
> > > > 
> > > > Restored tree: ttydev.
> > > > 
> > > > Temporarily dropped tree: acpi (confusion about its source).
> > > > 
> > > > Most of the differences were conflicts moving from tree to tree as some
> > > > of the trees are now merged into Linus' tree.  Most have been inflicted
> > > > on the driver-core and usb trees.  I have not notified these separately.
> > > > 
> > > > Because of the moving of conflicts around it is difficult to tell when
> > > > they are going away (though I assume some are).
> > > > 
> > > > The driver-core tree gained a conflict against Linus' tree.
> > > > 
> > > > The usb tree inherited a build fix patch from the pci tree.
> > > > 
> > > > The x86 tree gained a trivial conflict against Linus' tree but it was in
> > > > a commit that is still being reverted.
> > > > 
> > > > The ocsf2 tree gained several conflicts against Linus' tree because what
> > > > was sent to Linus was not the same as what is in linuxt-next.
> > > > 
> > > > The vfs tree gained conflicts against Linus' tree, the sparc tree and the
> > > > mips tree.
> > > > 
> > > > The semaphore-removal tree gained conflicts against Linus' tree that
> > > > required the reversion of two commits.
> > > > 
> > > > The ttydev tree had two patches that didn't apply and gained conflicts
> > > > against the wireless tree and the usb tree (4).  It also required a build
> > > > fix patch.
> > > > 
> > > > Lots of conflicts have gone from the x86 and ubifs trees.
> > > > 
> > > > I have also applied the following patches for known problems:
> > > > 
> > > > 	sparc64: sysdev API change fallout
> > > > 	sparc32: smp_call_function API change fallout (this has already
> > > > been fixed in the upstream sparc tree and comes from an incomplete merge
> > > > on my part).
> > > > 
> > > > This tree fails to build for ARCH=sparc (i.e. 32bit) with a 64bit gcc
> > > > v3.4.5 - it tries to use the 64bit header files.  This may be an artifact
> > > > of one of my merge fixups, but I don't actually think so.
> > > > 
> > > > ----------------------------------------------------------------------------
> > > 
> > > commit db99b98885e717454feef1c6868b27d3f23c2e7c
> > > Author: Stephen Hemminger <shemminger@...tta.com>
> > > Date:   Wed May 14 17:04:16 2008 -0700
> > > 
> > >     sky2: put PHY in sleep when down
> > > 
> > > and
> > > 
> > > commit a068c0adf2fe28b324bca87f85d27af7f993cdaf
> > > Author: Stephen Hemminger <shemminger@...tta.com>
> > > Date:   Wed May 14 17:04:17 2008 -0700
> > > 
> > >     sky2: pci power savings
> > > 
> > > break Wake-on-LAN on my test box using sky2.  More specifically, with these
> > > two commits applied the box hangs solid during hibernation/power off
> > > while executing the sky2 callbacks.
> > > 
> > > The adapter is reported as 88E8056 (Asus M3A32-MVP Deluxe mainboard).
> > 
> > Wake-on-lan from suspend or wake-on-lan from shutdown? which is the problem.
> 
> In both cases (ie. hibernation and shutdown) if I run 'ethtool -s eth0 wol g'
> before the operation, the box will hang solid while executing either
> sky2_suspend() or sky2_shutdown().
> 
> So far, I have verified that it happens after sky2_wol_init(), during the
> execution of sky2_power_aux().  However, if sky2_power_aux() is commented
> out, the box hangs while executing pci_enable_wake().

I've just verified that the problem is caused by commit
db99b98885e717454feef1c6868b27d3f23c2e7c ("sky2: put PHY in sleep when down").

After reverting this commit, the problem goes away.

Thanks,
Rafael
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