Re: During xHC Initialization (device is not connected), when HC-RESET is asserted, software is not expecting WRC or PRC bit set

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On Wed, 31 Oct 2012, Bhavik Kothari wrote:

> Hi Alan,
> 
> Thanks for your inputs.
> 
> As per your given instruction, we have modified a code and below is a patch,
> 
> 
> --- a/linux-3.6.1/drivers/usb/core/hub.c    2012-10-07 21:11:28.000000000
> +0530
> +++ b/linux-3.6.1/drivers/usb/core/hub.c    2012-10-31 11:37:26.760917272
> +0530
> @@ -1078,6 +1078,12 @@ static void hub_activate(struct usb_hub
>              clear_port_feature(hub->hdev, port1,
>                      USB_PORT_FEAT_C_BH_PORT_RESET);
>          }
> +        if (portchange & USB_PORT_STAT_C_RESET) {
> +            need_debounce_delay = true;
> +            clear_port_feature(hub->hdev, port1,
> +                    USB_PORT_FEAT_C_RESET);
> +        }
> +
>          /* We can forget about a "removed" device when there's a
>           * physical disconnect or the connect status changes.
>           */
> 
> 
> We have created a patch using Linux 3.6.1 code. Now, we would like to
> submit the patch.
> 
> Please let us know, in case of any concern.

Please follow the instructions in Documentation/SubmittingPatches.

And be careful to use a mail program that doesn't damage the whitespace
in the patch.  In the patch above, the tab characters were converted to
spaces.  This makes the patch useless.

Alan Stern

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