linux-kernel - Re: ACPI: resolve GPE immediate wakeup regression

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Message-Id: <200703121306.59437.lenb@kernel.org>
Date:	Mon, 12 Mar 2007 13:06:59 -0400
From:	Len Brown <lenb@...nel.org>
To:	Ray Lee <ray-lk@...rabbit.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: Re: ACPI: resolve GPE immediate wakeup regression

On Monday 12 March 2007 12:59, Ray Lee wrote:
> 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.

Thanks for testing Ray,
I'll apply this one.

-Len

> ---
> 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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