usb: dwc3: gadget: Refactor dwc3_gadget_ep_dequeue

The flow from function dwc3_gadget_ep_dequeue() is not easy to follow.
Refactor it for easier read. No functional change in this commit.
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>

drivers/usb/dwc3/gadget.c

@@ -1562,19 +1562,17 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 
 	list_for_each_entry(r, &dep->cancelled_list, list) {
 		if (r == req)
-			goto out0;
+			goto out;
 	}
 
 	list_for_each_entry(r, &dep->pending_list, list) {
-		if (r == req)
-			break;
+		if (r == req) {
+			dwc3_gadget_giveback(dep, req, -ECONNRESET);
+			goto out;
+		}
 	}
 
-	if (r != req) {
 	list_for_each_entry(r, &dep->started_list, list) {
-			if (r == req)
-				break;
-		}
 		if (r == req) {
 			struct dwc3_request *t;
 
@@ -1588,17 +1586,14 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 			list_for_each_entry_safe(r, t, &dep->started_list, list)
 				dwc3_gadget_move_cancelled_request(r);
 
-			goto out0;
+			goto out;
+		}
 	}
+
 	dev_err(dwc->dev, "request %pK was not queued to %s\n",
 		request, ep->name);
 	ret = -EINVAL;
-		goto out0;
-	}
-
-	dwc3_gadget_giveback(dep, req, -ECONNRESET);
-
-out0:
+out:
 	spin_unlock_irqrestore(&dwc->lock, flags);
 
 	return ret;