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

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Date:	Tue, 12 Jan 2016 15:43:33 +0100
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	"Fu, Zhonghui" <zhonghui.fu@...ux.intel.com>
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 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.

>
> 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