1 files changed, 26 insertions, 2 deletions

diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 6dee4dabc0a4..4de8e5f091cb 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -524,6 +524,11 @@ static int dwc3_ep0_handle_endpoint(struct dwc3 *dwc,
 		ret = __dwc3_gadget_ep_set_halt(dep, set, true);
 		if (ret)
 			return -EINVAL;
+
+		/* ClearFeature(Halt) may need delayed status */
+		if (!set && (dep->flags & DWC3_EP_END_TRANSFER_PENDING))
+			return USB_GADGET_DELAYED_STATUS;
+
 		break;
 	default:
 		return -EINVAL;
@@ -942,12 +947,16 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 		struct dwc3_ep *dep, struct dwc3_request *req)
 {
+	unsigned int		trb_length = 0;
 	int			ret;
 
 	req->direction = !!dep->number;
 
 	if (req->request.length == 0) {
-		dwc3_ep0_prepare_one_trb(dep, dwc->ep0_trb_addr, 0,
+		if (!req->direction)
+			trb_length = dep->endpoint.maxpacket;
+
+		dwc3_ep0_prepare_one_trb(dep, dwc->bounce_addr, trb_length,
 				DWC3_TRBCTL_CONTROL_DATA, false);
 		ret = dwc3_ep0_start_trans(dep);
 	} else if (!IS_ALIGNED(req->request.length, dep->endpoint.maxpacket)
@@ -994,9 +1003,12 @@ static void __dwc3_ep0_do_control_data(struct dwc3 *dwc,
 
 		req->trb = &dwc->ep0_trb[dep->trb_enqueue - 1];
 
+		if (!req->direction)
+			trb_length = dep->endpoint.maxpacket;
+
 		/* Now prepare one extra TRB to align transfer size */
 		dwc3_ep0_prepare_one_trb(dep, dwc->bounce_addr,
-					 0, DWC3_TRBCTL_CONTROL_DATA,
+					 trb_length, DWC3_TRBCTL_CONTROL_DATA,
 					 false);
 		ret = dwc3_ep0_start_trans(dep);
 	} else {
@@ -1042,6 +1054,18 @@ static void dwc3_ep0_do_control_status(struct dwc3 *dwc,
 	__dwc3_ep0_do_control_status(dwc, dep);
 }
 
+void dwc3_ep0_send_delayed_status(struct dwc3 *dwc)
+{
+	unsigned int direction = !dwc->ep0_expect_in;
+
+	dwc->delayed_status = false;
+
+	if (dwc->ep0state != EP0_STATUS_PHASE)
+		return;
+
+	__dwc3_ep0_do_control_status(dwc, dwc->eps[direction]);
+}
+
 static void dwc3_ep0_end_control_data(struct dwc3 *dwc, struct dwc3_ep *dep)
 {
 	struct dwc3_gadget_ep_cmd_params params;