diff options
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index a47cc1e97fae..711b23019d54 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -828,12 +828,19 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc, dwc3_ep0_stall_and_restart(dwc); } else { - /* - * handle the case where we have to send a zero packet. This - * seems to be case when req.length > maxpacket. Could it be? - */ - if (r) - dwc3_gadget_giveback(ep0, r, 0); + dwc3_gadget_giveback(ep0, r, 0); + + if (IS_ALIGNED(ur->length, ep0->endpoint.maxpacket) && + ur->length && ur->zero) { + int ret; + + dwc->ep0_next_event = DWC3_EP0_COMPLETE; + + ret = dwc3_ep0_start_trans(dwc, epnum, + dwc->ctrl_req_addr, 0, + DWC3_TRBCTL_CONTROL_DATA); + WARN_ON(ret < 0); + } } } |