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Re: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously

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On 28 December 2015 at 16:39, Fu, Zhonghui <zhonghui.fu@linux.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 mmc hosts to suspend/resume asynchronously. This will take
> advantage of multicore and improve system suspend/resume speed.
> After applying this patch and enabling all mmc hosts' child devices
> to suspend/resume asynchronously on ASUS T100TA, the system
> suspend-to-idle time is reduced from 1645ms to 1107ms, and the
> system resume time is reduced from 940ms to 914ms.

Please update the  change log as I don't think the above is really correct.

I think you can simplify the change log quite a bit and just mention
what and why we want this change.

>
> Signed-off-by: Zhonghui Fu <zhonghui.fu@linux.intel.com>
> ---
>  drivers/mmc/core/host.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index da950c4..7222fd7 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
>         host->class_dev.parent = dev;
>         host->class_dev.class = &mmc_host_class;
>         device_initialize(&host->class_dev);
> +       device_enable_async_suspend(&host->class_dev);
>
>         if (mmc_gpio_alloc(host)) {
>                 put_device(&host->class_dev);
> -- 1.7.1
>

Otherwise I think this looks good!

Kind regards
Uffe

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Re: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously Ulf Hansson <ulf.hansson@linaro.org> - 2016-01-12 15:50 +0100

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