linux-kernel - Re: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously

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Date:	Fri, 22 Jan 2016 12:38:53 +0800
From:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	Adrian Hunter <adrian.hunter@...el.com>,
	Michele Curti <michele.curti@...il.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to
 suspend/resume asynchronously



On 1/12/2016 10:43 PM, Ulf Hansson wrote:
> On 28 December 2015 at 16:41, Fu, Zhonghui <zhonghui.fu@...ux.intel.com> wrote:
>> Now, PM core supports asynchronous suspend/resume mode for devices
>> during system suspend/resume, and the power state transition of one
>> device may be completed in separate kernel thread. PM core ensures
>> all power state transition dependency between devices. This patch
>> enables sdhci-acpi devices to suspend/resume asynchronously. This
>> will take advantage of multicore and improve system suspend/resume
>> speed. After enabling the sdhci-acpi devices and all their child
>> devices to suspend/resume asynchronously on ASUS T100TA, the system
>> suspend-to-idle time is reduced from 1645ms to 1089ms, and the
>> system resume time is reduced from 940ms to 908ms.
> Same comment as for patch 1.

I have updated the change log according to your comments and resent this patch - "[PATCH 2/2 v2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously".


Thanks,
Zhonghui


>
>> Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com>
>> ---
>>  drivers/mmc/host/sdhci-acpi.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
>> index f6047fc..3d27f2d 100644
>> --- a/drivers/mmc/host/sdhci-acpi.c
>> +++ b/drivers/mmc/host/sdhci-acpi.c
>> @@ -388,6 +388,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev)
>>                 pm_runtime_enable(dev);
>>         }
>>
>> +       device_enable_async_suspend(dev);
>> +
>>         return 0;
>>
>>  err_free:
>> -- 1.7.1
>>
> Otherwise, looks good!
>
> Kind regards
> Uffe