On Thursday, 11 of September 2008, Andrew Morton wrote:
> On Tue, 9 Sep 2008 15:14:22 +0200
> "Rafael J. Wysocki" <rjw@xxxxxxx> wrote:
>
> > On Tuesday, 9 of September 2008, Frans Pop wrote:
> > > (Resending because of error in mail headers in previous attempt; sorry)
> > >
> > > On my Toshiba Satellite A40 with 2.6.27-rc4/5 I noticed the following
> > > error in the boot log (not there with 2.6.26):
> > > e100: 0000:01:08.0: e100_probe: Error clearing wake event
> > >
> > > Bisection has fingered the following patch as the cause of the message.
> > >
> > > commit eb9d0fe40e313c0a74115ef456a2e43a6c8da72f
> > > Author: Rafael J. Wysocki <rjw@xxxxxxx>
> > > Date: Mon Jul 7 03:34:48 2008 +0200
> > > PCI ACPI: Rework PCI handling of wake-up
> > >
> > > The test this error originates from in drivers/net/e100.c is old and has
> > > not changed recently.
> > >
> > > Surrounding messages (full dmesg attached):
> > > e100: Intel(R) PRO/100 Network Driver, 3.5.23-k4-NAPI
> > > e100: Copyright(c) 1999-2006 Intel Corporation
> > > e100 0000:01:08.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
> > > e100: 0000:01:08.0: e100_probe: Error clearing wake event
> > > e100: eth0: e100_probe: addr 0xcffff000, irq 20, MAC addr
> > > 00:08:0d:17:bf:f5
> > >
> > > The NIC is:
> > > 01:08.0 Ethernet controller [0200]: Intel Corporation 82801DB PRO/100 VE
> > > (MOB) Ethernet Controller [8086:103d] (rev 83)
> > > Kernel driver in use: e100
> >
> > The message is actually harmless, but I agree that it's confusing.
> >
> > The appended patch should fix the problem (ISTR sending it some time ago
> > already).
> >
> > Thanks,
> > Rafael
> >
> > ---
> > From: Rafael J. Wysocki <rjw@xxxxxxx>
> >
> > e100: Use pci_pme_active for clearing wake-up events and disabling PME#
> >
> > Currently e100 uses pci_enable_wake() to clear pending wake-up events
> > and disable PME# during intitialization, but that function is not
> > suitable for this purpose, because it immediately returns error code
> > if device_may_wakeup() returns false for given device.
> >
> > Make e100 use pci_pme_active(), which carries out exactly the
> > required operations, instead.
> >
> > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> > ---
> > drivers/net/e100.c | 4 +---
> > 1 file changed, 1 insertion(+), 3 deletions(-)
> >
> > Index: linux-2.6/drivers/net/e100.c
> > ===================================================================
> > --- linux-2.6.orig/drivers/net/e100.c
> > +++ linux-2.6/drivers/net/e100.c
> > @@ -2738,9 +2738,7 @@ static int __devinit e100_probe(struct p
> > nic->flags |= wol_magic;
> >
> > /* ack any pending wake events, disable PME */
> > - err = pci_enable_wake(pdev, 0, 0);
> > - if (err)
> > - DPRINTK(PROBE, ERR, "Error clearing wake event\n");
> > + pci_pme_active(pdev, false);
> >
> > strcpy(netdev->name, "eth%d");
> > if((err = register_netdev(netdev))) {
>
> This change is already included in
>
> e100-adapt-to-the-reworked-pci-pm.patch:
Yes, it is.
> From: "Rafael J. Wysocki" <rjw@xxxxxxx>
>
> Adapt the e100 driver to the reworked PCI PM
>
> * Use device_set_wakeup_enable() and friends as needed
> * Use pci_pme_active() to clear PME_Status and disable PME#
> * Use the observation that it is sufficient to call pci_enable_wake()
> once, unless it fails
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> Tested-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@xxxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> Cc: Jeff Garzik <jeff@xxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
>
>
> which I sent to Jeff on Aug 20 as a for-2.6.28 thing.
>
> Maybe I should just mark e100-adapt-to-the-reworked-pci-pm.patch as a
> for-2.6.27 thing next time I send that (large) pile of maybe-for-2.6.27
> netdev patches.
>
> e100-adapt-to-the-reworked-pci-pm.patch
This one shouldn't hurt, it has been tested by people with relevant hardware.
> drivers-net-skfp-pmfc-use-offsetof-macro.patch
> drivers-net-atl1e-dont-take-the-mdio_lock-in-atl1e_probe.patch
> e1000e-prevent-corruption-of-eeprom-nvm.patch
> drivers-net-mlx4-allocc-needs-mmh.patch
> net-forcedeth-call-restore-mac-addr-in-nv_shutdown-path-v2.patch
This is a (listed) regression fix that Jeff promised to have a look at.
> ehea-fix-dlpar-memory-handling.patch
> nec-fix-rmmod-platform-driver-improvements.patch
> nec-fix-suspend-and-resume-for-isa-pnp-cards.patch
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