On Tue, Oct 20, 2015 at 11:29:18AM +0900, Jiada Wang wrote:
> Currently in udc_stop, if vbus_active flag is true, all USB activities
> will be stopped, but vbus_active flag is still left to be true,
> this causes issue, when afterwards driver tries to connect gadget
> device to host, But due to the uncleared vbus_active, some necessary
> setup steps are skipped.
>
> This patch clears vbus_active flag in udc_stop callback.
>
> Signed-off-by: Jiada Wang <jiada_w...@mentor.com>
> ---
> drivers/usb/chipidea/udc.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index 8223fe7..b9ac228 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
> @@ -1762,6 +1762,7 @@ static int ci_udc_stop(struct usb_gadget *gadget)
> spin_lock_irqsave(&ci->lock, flags);
>
> if (ci->vbus_active) {
> + ci->vbus_active = 0;
> hw_device_state(ci, 0);
> if (ci->platdata->notify_event)
> ci->platdata->notify_event(ci,
> --
> 2.4.5
>
This flag will be handled by vbus interrupt, would you please explain
more what problem you have met?
--
Best Regards,
Peter Chen
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