linux-kernel - Re: [RFC PATCH v2 4/8] libata-acpi: set acpi state for SATA port

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Date:	Mon, 12 Mar 2012 10:02:50 +0800
From:	Aaron Lu <aaron.lu@....com>
To:	Lin Ming <ming.m.lin@...el.com>, <"@ladygaga"@domain.invalid>
CC:	Zhang Rui <rui.zhang@...el.com>, Jeff Garzik <jgarzik@...ox.com>,
	Alan Stern <stern@...land.harvard.edu>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Tejun Heo <tj@...nel.org>,
	<linux-kernel@...r.kernel.org>, <linux-ide@...r.kernel.org>,
	<linux-scsi@...r.kernel.org>, <linux-pm@...r.kernel.org>,
	linux-acpi <linux-acpi@...r.kernel.org>
Subject: Re: [RFC PATCH v2 4/8] libata-acpi: set acpi state for SATA port

Hi,

On Thu, Mar 01, 2012 at 05:02:53PM +0800, Lin Ming wrote:
> Currently, ata_acpi_set_state() only sets acpi sate for IDE port.
> Remove this limitation.
> 
> Signed-off-by: Lin Ming <ming.m.lin@...el.com>
> ---
>  drivers/ata/libata-acpi.c |   21 ++++++++++++---------
>  1 files changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c
> index b03e468..104c1d0 100644
> --- a/drivers/ata/libata-acpi.c
> +++ b/drivers/ata/libata-acpi.c
> @@ -841,23 +841,26 @@ void ata_acpi_on_resume(struct ata_port *ap)
>  void ata_acpi_set_state(struct ata_port *ap, pm_message_t state)
>  {
>  	struct ata_device *dev;
> -
> -	if (!ata_ap_acpi_handle(ap) || (ap->flags & ATA_FLAG_ACPI_SATA))
> -		return;
> +	acpi_handle handle;
> +	int acpi_state;
>  
>  	/* channel first and then drives for power on and vica versa
>  	   for power off */
> -	if (state.event == PM_EVENT_ON)
> -		acpi_bus_set_power(ata_ap_acpi_handle(ap), ACPI_STATE_D0);
> +	handle = ata_ap_acpi_handle(ap);
> +	if (handle && state.event == PM_EVENT_ON)
> +		acpi_bus_set_power(handle, ACPI_STATE_D0);
>  
>  	ata_for_each_dev(dev, &ap->link, ENABLED) {
> -		if (ata_dev_acpi_handle(dev))
> -			acpi_bus_set_power(ata_dev_acpi_handle(dev),
> +		handle = ata_dev_acpi_handle(dev);
> +		if (handle)
> +			acpi_bus_set_power(handle,
>  				state.event == PM_EVENT_ON ?
>  					ACPI_STATE_D0 : ACPI_STATE_D3);
>  	}
> -	if (state.event != PM_EVENT_ON)
> -		acpi_bus_set_power(ata_ap_acpi_handle(ap), ACPI_STATE_D3);
> +
> +	handle = ata_ap_acpi_handle(ap);
> +	if (handle && state.event != PM_EVENT_ON)
> +		acpi_bus_set_power(handle, ACPI_STATE_D3);
>  }
>  
>  /**

Acked-by: Aaron Lu <aaron.lu@....com>

> -- 
> 1.7.2.5
> 
> 

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