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Commit 68e823e2 authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: dwc3: gadget: don't return anything on prepare trbs 



all that function does is setup a TRB to be sent
to HW later. There's no need to return anything
actually.

Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent c71fc37c

drivers/usb/dwc3/gadget.c

+9 −13
Original line number Diff line number Diff line
@@ -544,7 +544,7 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep, 
 * @dep: endpoint for which this request is prepared

 * @req: dwc3_request pointer

 */

static int dwc3_prepare_one_trb(struct dwc3_ep *dep,

static void dwc3_prepare_one_trb(struct dwc3_ep *dep,

		struct dwc3_request *req, unsigned last)

{

	struct dwc3_trb_hw	*trb_hw;
@@ -559,7 +559,7 @@ static int dwc3_prepare_one_trb(struct dwc3_ep *dep, 
	/* Skip the LINK-TRB on ISOC */

	if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&

			usb_endpoint_xfer_isoc(dep->desc))

		return 0;

		return;



	dwc3_gadget_move_request_queued(req);

	memset(&trb, 0, sizeof(trb));
@@ -607,8 +607,6 @@ static int dwc3_prepare_one_trb(struct dwc3_ep *dep, 


	dwc3_trb_to_hw(&trb, trb_hw);

	req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw);



	return 0;

}



/*
@@ -620,10 +618,9 @@ static int dwc3_prepare_one_trb(struct dwc3_ep *dep, 
 * transfers. The functions returns once there are not more TRBs available or

 * it run out of requests.

 */

static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep,

		bool starting)

static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)

{

	struct dwc3_request	*req, *n, *ret = NULL;

	struct dwc3_request	*req, *n;

	u32			trbs_left;

	unsigned int		last_one = 0;
@@ -639,7 +636,7 @@ static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep, 
	 */

	if (!trbs_left) {

		if (!starting)

			return NULL;

			return;

		trbs_left = DWC3_TRB_NUM;

		/*

		 * In case we start from scratch, we queue the ISOC requests
@@ -663,7 +660,7 @@ static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep, 


	/* The last TRB is a link TRB, not used for xfer */

	if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc))

		return NULL;

		return;



	list_for_each_entry_safe(req, n, &dep->request_list, list) {

		trbs_left--;
@@ -684,11 +681,8 @@ static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep, 
		 * multiple TRBs handling, use only one TRB at a time.

		 */

		dwc3_prepare_one_trb(dep, req, true);

		ret = req;

		break;

	}



	return ret;

}



static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
@@ -717,11 +711,13 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param, 
		/* req points to the first request which will be sent */

		req = next_request(&dep->req_queued);

	} else {

		dwc3_prepare_trbs(dep, start_new);



		/*

		 * req points to the first request where HWO changed

		 * from 0 to 1

		 */

		req = dwc3_prepare_trbs(dep, start_new);

		req = next_request(&dep->req_queued);

	}

	if (!req) {

		dep->flags |= DWC3_EP_PENDING_REQUEST;