linux-kernel - Re: commit 9630bdd9 changes behavior of the poweroff

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Date:	Tue, 13 Apr 2010 01:01:54 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Tony Vroon <tony@...x.net>, Michal Hocko <mhocko@...e.cz>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	linux-kernel@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: commit 9630bdd9 changes behavior of the poweroff - bug?

On Saturday 10 April 2010, Rafael J. Wysocki wrote:
> On Friday 09 April 2010, Tony Vroon wrote:
> > On Fri, 2010-04-09 at 22:42 +0200, Rafael J. Wysocki wrote:
> > > Please check if the patch below changes anything.
> > >  drivers/acpi/wakeup.c |    4 ++--
> > >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > That didn't change the behaviour for me, sorry.
> 
> Well, I would be sorry if it did, because the patch removed some useful code. :-)
> 
> > (I made sure to go through a full power down session before trying the
> > patched kernel)
> 
> Thanks for testing.  So it looks like we don't disable the GPE during power off.
> 
> I'll try to figure out what's going on, please stay tuned.

Can you please check if the patch below changes the behavior?

Rafael

---
 drivers/acpi/wakeup.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux-2.6/drivers/acpi/wakeup.c
===================================================================
--- linux-2.6.orig/drivers/acpi/wakeup.c
+++ linux-2.6/drivers/acpi/wakeup.c
@@ -63,17 +63,17 @@ void acpi_enable_wakeup_device(u8 sleep_
 	list_for_each_safe(node, next, &acpi_wakeup_device_list) {
 		struct acpi_device *dev =
 			container_of(node, struct acpi_device, wakeup_list);
+		u8 action = ACPI_GPE_ENABLE;
 
 		if (!dev->wakeup.flags.valid)
 			continue;
 
 		if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
 		    || sleep_state > (u32) dev->wakeup.sleep_state)
-			continue;
+			action = ACPI_GPE_DISABLE;
 
-		/* The wake-up power should have been enabled already. */
 		acpi_set_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
-				ACPI_GPE_ENABLE);
+				action);
 	}
 }
 
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