Messages in this thread Patch in this message | | | From | Wesley Cheng <> | Subject | [PATCH v4 9/9] usb: dwc3: gadget: Submit endxfer command if delayed during disconnect | Date | Wed, 17 Aug 2022 11:23:59 -0700 |
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During a cable disconnect sequence, if ep0state is not in the SETUP phase, then nothing will trigger any pending end transfer commands. Force stopping of any pending SETUP transaction, and move back to the SETUP phase.
Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com> --- drivers/usb/dwc3/gadget.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 4f862552fe00..07d57542ad01 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3776,13 +3776,24 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc) reg &= ~DWC3_DCTL_INITU2ENA; dwc3_gadget_dctl_write_safe(dwc, reg); + dwc->connected = false; + dwc3_disconnect_gadget(dwc); dwc->gadget->speed = USB_SPEED_UNKNOWN; dwc->setup_packet_pending = false; usb_gadget_set_state(dwc->gadget, USB_STATE_NOTATTACHED); - dwc->connected = false; + if (dwc->ep0state != EP0_SETUP_PHASE) { + unsigned int dir; + + dir = !!dwc->ep0_expect_in; + if (dwc->ep0state == EP0_DATA_PHASE) + dwc3_ep0_end_control_data(dwc, dwc->eps[dir]); + else + dwc3_ep0_end_control_data(dwc, dwc->eps[!dir]); + dwc3_ep0_stall_and_restart(dwc); + } } static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
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