linux-kernel - Re: [PATCH] ACPI / platform / LPSS: disable async suspend/resume of LPSS devices

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Message-ID: <74255682.ogZlaWiZ0J@vostro.rjw.lan>
Date:	Tue, 09 Sep 2014 15:17:23 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
Cc:	lenb@...nel.org, linux-acpi@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI / platform / LPSS: disable async suspend/resume of LPSS devices

On Tuesday, September 09, 2014 01:36:48 PM Fu, Zhonghui wrote:
> From 6deb00230f5df68da3ca7490402a0c537bf386bb Mon Sep 17 00:00:00 2001
> From: Fu Zhonghui <zhonghui.fu@...ux.intel.com>
> Date: Tue, 9 Sep 2014 13:02:25 +0800
> Subject: [PATCH] ACPI / platform / LPSS: disable async suspend/resume of LPSS devices
> 
> LPSS devices must suspend/resume in fixed order. Or some LPSS devices
> will hang during the transition to ACPI_STATE_D0 state.
> 
> Signed-off-by: Li Aubrey <aubrey.li@...ux.intel.com>
> Signed-off-by: Fu Zhonghui <zhonghui.fu@...ux.intel.com>
> ---
>  drivers/acpi/acpi_lpss.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
> index fddc1e8..54e5c97 100644
> --- a/drivers/acpi/acpi_lpss.c
> +++ b/drivers/acpi/acpi_lpss.c
> @@ -419,7 +419,7 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
>  	adev->driver_data = pdata;
>  	pdev = acpi_create_platform_device(adev);
>  	if (!IS_ERR_OR_NULL(pdev)) {
> -		device_enable_async_suspend(&pdev->dev);
> +		device_disable_async_suspend(&pdev->dev);

Removing the "enable" line should be sufficient for that.  Isn't it?

>  		return 1;
>  	}
>  
> -- 1.7.1
> 
> --
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-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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