linux-kernel - Re: [PATCH RESEND v7 1/1] usb: xhci: plat: Enable async suspend/resume

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Message-ID: <CAMz4kuKw_HapmGg4Qm2r4Cz7s=6aKm9BX4AZUa9i_kvgWasHYw@mail.gmail.com>
Date:   Mon, 20 Feb 2017 10:50:17 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     Robert Foss <robert.foss@...labora.com>
Cc:     Mathias Nyman <mathias.nyman@...el.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        USB <linux-usb@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Julius Werner <jwerner@...omium.org>,
        Andrew Bresticker <abrestic@...omium.org>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Brian Norris <briannorris@...omium.org>
Subject: Re: [PATCH RESEND v7 1/1] usb: xhci: plat: Enable async suspend/resume

On 10 February 2017 at 22:56, Robert Foss <robert.foss@...labora.com> wrote:
> From: Andrew Bresticker <abrestic@...omium.org>
>
> USB host controllers can take a significant amount of time to suspend
> and resume, adding several hundred miliseconds to the kernel resume
> time. Since the XHCI controller has no outside dependencies (other than
> clocks, which are suspended late/resumed early), allow it to suspend and
> resume asynchronously.
>
> Signed-off-by: Andrew Bresticker <abrestic@...omium.org>
> Tested-by: Andrew Bresticker <abrestic@...omium.org>
> Tested-by: Robert Foss <robert.foss@...labora.com>
> Signed-off-by: Robert Foss <robert.foss@...labora.com>
> ---
>  drivers/usb/host/xhci-plat.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
> index 3cf8e120c620..4d6741a0d8f8 100644
> --- a/drivers/usb/host/xhci-plat.c
> +++ b/drivers/usb/host/xhci-plat.c
> @@ -257,6 +257,7 @@ static int xhci_plat_probe(struct platform_device *pdev)
>
>         pm_runtime_set_active(&pdev->dev);
>         pm_runtime_enable(&pdev->dev);
> +       device_enable_async_suspend(&pdev->dev);
>
>         return 0;
>
> --
> 2.11.0.453.g787f75f05
>

Reviewed-by: Baolin Wang <baolin.wang@...aro.org>

-- 
Baolin.wang
Best Regards