On Mon, Aug 15, 2016 at 04:09:07PM +0200, Lucas Stach wrote:
> The Chipidea EHCI core seems to behave sanely and doesn't need
> the IO watchdog. This kills off 10 non-deferrable wakeup events
> per second when the controller is otherwise idle.
>
> Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> Tested-by: Stefan Agner <stefan@xxxxxxxx>
> ---
> drivers/usb/chipidea/host.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
> index 053bac9d983c..96ae69502c86 100644
> --- a/drivers/usb/chipidea/host.c
> +++ b/drivers/usb/chipidea/host.c
> @@ -81,12 +81,15 @@ static int ehci_ci_reset(struct usb_hcd *hcd)
> {
> struct device *dev = hcd->self.controller;
> struct ci_hdrc *ci = dev_get_drvdata(dev);
> + struct ehci_hcd *ehci = hcd_to_ehci(hcd);
> int ret;
>
> ret = ehci_setup(hcd);
> if (ret)
> return ret;
>
> + ehci->need_io_watchdog = 0;
> +
> ci_platform_configure(ci);
>
> return ret;
> --
> 2.8.1
>
I will test it
--
Best Regards,
Peter Chen
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