linux-kernel - Re: [PATCH v5 2/5] acpi: Call acpi_os_prepare_sleep hook in reduced hardware sleep path

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Date:	Fri, 28 Jun 2013 12:06:37 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Ben Guthro <benjamin.guthro@...rix.com>
Cc:	Jan Beulich <jbeulich@...e.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, xen-devel@...ts.xen.org,
	Bob Moore <robert.moore@...el.com>
Subject: Re: [PATCH v5 2/5] acpi: Call acpi_os_prepare_sleep hook in reduced
 hardware sleep path

On Fri, Jun 28, 2013 at 09:46:21AM -0400, Ben Guthro wrote:
> In version 3.4 acpi_os_prepare_sleep() got introduced in parallel with
> reduced hardware sleep support, and the two changes didn't get
> synchronized: The new code doesn't call the hook function (if so
> requested). Fix this, requiring a parameter to be added to the
> hook function to distinguish "extended" from "legacy" sleep.
> 
> Signed-off-by: Jan Beulich <jbeulich@...e.com>
> Signed-off-by: Ben Guthro <benjamin.guthro@...rix.com>
> Cc: Bob Moore <robert.moore@...el.com>
> Cc: Rafael J. Wysocki <rjw@...k.pl>
> Cc: linux-acpi@...r.kernel.org

You can also add
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>

> ---
>  drivers/acpi/acpica/hwesleep.c |    7 +++++++
>  drivers/acpi/acpica/hwsleep.c  |    2 +-
>  include/acpi/acpiosxf.h        |    4 ++--
>  3 files changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/acpi/acpica/hwesleep.c b/drivers/acpi/acpica/hwesleep.c
> index 5e5f762..69b3e15 100644
> --- a/drivers/acpi/acpica/hwesleep.c
> +++ b/drivers/acpi/acpica/hwesleep.c
> @@ -128,6 +128,13 @@ acpi_status acpi_hw_extended_sleep(u8 sleep_state)
>  
>  	ACPI_FLUSH_CPU_CACHE();
>  
> +	status = acpi_os_prepare_sleep(sleep_state, acpi_gbl_sleep_type_a,
> +				       acpi_gbl_sleep_type_b, TRUE);
> +	if (ACPI_SKIP(status))
> +		return_ACPI_STATUS(AE_OK);
> +	if (ACPI_FAILURE(status))
> +		return_ACPI_STATUS(status);
> +
>  	/*
>  	 * Set the SLP_TYP and SLP_EN bits.
>  	 *
> diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c
> index 867b947..cf78157 100644
> --- a/drivers/acpi/acpica/hwsleep.c
> +++ b/drivers/acpi/acpica/hwsleep.c
> @@ -152,7 +152,7 @@ acpi_status acpi_hw_legacy_sleep(u8 sleep_state)
>  	ACPI_FLUSH_CPU_CACHE();
>  
>  	status = acpi_os_prepare_sleep(sleep_state, pm1a_control,
> -				       pm1b_control);
> +				       pm1b_control, FALSE);
>  	if (ACPI_SKIP(status))
>  		return_ACPI_STATUS(AE_OK);
>  	if (ACPI_FAILURE(status))
> diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
> index c68b779..51d0f78 100644
> --- a/include/acpi/acpiosxf.h
> +++ b/include/acpi/acpiosxf.h
> @@ -279,7 +279,7 @@ void acpi_os_close_directory(void *dir_handle);
>  /*
>   * ACPI sleep preparation
>   */
> -acpi_status acpi_os_prepare_sleep(u8 sleep_state,
> -				  u32 pm1a_control, u32 pm1b_control);
> +acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 val_a, u32 val_b,
> +				  u8 extended);
>  
>  #endif				/* __ACPIOSXF_H__ */
> -- 
> 1.7.9.5
> 
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