linux-kernel - ACPI: resolve GPE immediate wakeup regression

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Date:	Mon, 12 Mar 2007 12:59:51 -0400
From:	Ray Lee <ray-lk@...rabbit.org>
To:	Len Brown <lenb@...nel.org>
Cc:	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>,
	Vladimir Lebedev <vladimir.p.lebedev@...el.com>,
	linux-acpi@...r.kernel.org
Subject: ACPI: resolve GPE immediate wakeup regression

Len Brown wrote:
> On Saturday 10 March 2007 01:18, Ray Lee wrote:
>> Ray Lee wrote:
>>> In 2.6.21-rc1,2,3, my laptop will fully suspend to ram, but then
>>> *immediately* resumes back from suspension. (It resumes just fine, as well.)
>> [...]
>>> HP/Compaq NX6125 system, AMD64, dmesg attached.
> 
> I'd rather not break the Acer, if possible.
> 
> Ray, Please test the incremental patch below.

Tested and Alexey's patch (copied below) fixes the problem. I added a
signed-off-by just in case; feel free to yank it if inappropriate.
Regardless, please apply.

Thanks Len, Alexey.

Ray
---
Subject: ACPI: resolve GPE immediate wakeup regression
From: Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>

Removing disabling of GPEs from enter_sleep function causes regression
on nx6125.
Doing disable_all_gpes both in prepare to sleep and in enter sleep
resolves regression,
while still fixes Acer notebooks.

Signed-off-by: Alexey Starikovskiy <alexey.y.starikovskiy@...ux.intel.com>
Signed-off-by: Len Brown <len.brown@...el.com>
Signed-off-by: Ray Lee <ray-lk@...rabbit.org>
---

 drivers/acpi/hardware/hwsleep.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/hardware/hwsleep.c
b/drivers/acpi/hardware/hwsleep.c
index 8fa9312..c84b1fa 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -300,6 +300,11 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8
sleep_state)
 	/*
 	 * 2) Enable all wakeup GPEs
 	 */
+	status = acpi_hw_disable_all_gpes();
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
 	acpi_gbl_system_awake_and_running = FALSE;

 	status = acpi_hw_enable_all_wakeup_gpes();


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