RE: [RFC PATCH v4] ACPICA/Events: Add support to ensure GPE is disabled by default for handlers.

["Zheng, Lv" <lv.zheng@intel.com>]

Hi, Kirill

Could also help to confirm if this patch can also fix the issue.
Please help to validate the 2 fix patchsets separately.

Thanks in advance.

Best regards
-Lv

> From: Zheng, Lv
> Sent: Thursday, November 20, 2014 2:45 PM
> 
> On some platforms, GPE is not disabled by default after ACPI hardware is
> enabled. This confuses GPE drivers. This patch adds support to disable GPE
> by default for GPE handler drivers.
> 
> Signed-off-by: Lv Zheng <lv.zheng@intel.com>
> Cc: Kirill A. Shutemov <kirill@shutemov.name>
> ---
>  drivers/acpi/acpica/evxface.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> Index: linux-acpica/drivers/acpi/acpica/evxface.c
> ===================================================================
> --- linux-acpica.orig/drivers/acpi/acpica/evxface.c
> +++ linux-acpica/drivers/acpi/acpica/evxface.c
> @@ -821,6 +821,14 @@ acpi_install_gpe_handler(acpi_handle gpe
>  	    ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
>  	gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_HANDLER);
> 
> +	/*
> +	 * Make sure that the GPE is disabled by default for the GPE
> +	 * handler driver. It is expected that the GPE handler driver
> +	 * should invoke acpi_enable_gpe() after installing the GPE
> +	 * handler.
> +	 */
> +	(void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
> +
>  	acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
> 
>  unlock_and_exit: