On Tue, Oct 07, 2014 at 11:07:53AM -0400, Alan Stern wrote:
>
> That's the difference. It appears to be caused by a bug in xhci-hcd.
> Does the patch below fix the problem?
>
Hi,
Your patch fixes it for me. So now USB port works well.
Thanks!
>
> Index: usb-3.17/drivers/usb/host/xhci-hub.c
> ===================================================================
> --- usb-3.17.orig/drivers/usb/host/xhci-hub.c
> +++ usb-3.17/drivers/usb/host/xhci-hub.c
> @@ -1136,13 +1136,11 @@ int xhci_bus_suspend(struct usb_hcd *hcd
> t2 |= PORT_LINK_STROBE | XDEV_U3;
> set_bit(port_index, &bus_state->bus_suspended);
> }
> - /* USB core sets remote wake mask for USB 3.0 hubs,
> - * including the USB 3.0 roothub, but only if CONFIG_PM_RUNTIME
> - * is enabled, so also enable remote wake here.
> + /* USB core sets remote wake mask for USB 3.0 hubs but
> + * not for USB 2.0 hubs (and only if CONFIG_PM_RUNTIME
> + * is enabled), so enable remote wake here.
> */
> - if (hcd->self.root_hub->do_remote_wakeup
> - && device_may_wakeup(hcd->self.controller)) {
> -
> + if (hcd->self.root_hub->do_remote_wakeup) {
> if (t1 & PORT_CONNECT) {
> t2 |= PORT_WKOC_E | PORT_WKDISC_E;
> t2 &= ~PORT_WKCONN_E;
>
>
>
--
WBR, Dmitry
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