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SubjectRe: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously
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Hi Ulf,

What do you think about this patch?


Thanks,
Zhonghui

On 12/28/2015 11:41 PM, Fu, Zhonghui 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.
>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.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
>

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