usb: dwc3: gadget: stop processing on HWO set

stop consuming TRBs when we reach one with HWO bit
already set. This will prevent us from prematurely
retiring a TRB.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

drivers/usb/dwc3/gadget.c

@@ -1979,16 +1979,7 @@ static int __dwc3_cleanup_done_trbs(struct dwc3 *dwc, struct dwc3_ep *dep,
 		trb->ctrl &= ~DWC3_TRB_CTRL_HWO;
 
 	if ((trb->ctrl & DWC3_TRB_CTRL_HWO) && status != -ESHUTDOWN)
-		/*
-		 * We continue despite the error. There is not much we
-		 * can do. If we don't clean it up we loop forever. If
-		 * we skip the TRB then it gets overwritten after a
-		 * while since we use them in a ring buffer. A BUG()
-		 * would help. Lets hope that if this occurs, someone
-		 * fixes the root cause instead of looking away :)
-		 */
-		dev_err(dwc->dev, "%s's TRB (%p) still owned by HW\n",
-				dep->name, trb);
+		return 1;
 
 	count = trb->size & DWC3_TRB_SIZE_MASK;