usb: xhci: remove goto 'cleanup' in handle_tx_event()

By removing the goto 'cleanup' statement, and replacing it with 'continue',
'break' and 'return', helps simplify the code and further showcase in which
case the while loop iterates.

This change prepares for the comprehensive handle_tx_event() rework.

Signed-off-by: Niklas Neronin <[email protected]>
Signed-off-by: Mathias Nyman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Epicurius

drivers/usb/host/xhci-ring.c

@@ -2727,15 +2727,19 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 					"still with TDs queued?\n",
 				 TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 				 ep_index);
-		goto cleanup;
+		if (ep->skip)
+			break;
+		return 0;
 	case COMP_RING_OVERRUN:
 		xhci_dbg(xhci, "overrun event on endpoint\n");
 		if (!list_empty(&ep_ring->td_list))
 			xhci_dbg(xhci, "Overrun Event for slot %d ep %d "
 					"still with TDs queued?\n",
 				 TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
 				 ep_index);
-		goto cleanup;
+		if (ep->skip)
+			break;
+		return 0;
 	case COMP_MISSED_SERVICE_ERROR:
 		/*
 		 * When encounter missed service error, one or more isoc tds
@@ -2770,7 +2774,9 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		xhci_warn(xhci,
 			  "ERROR Unknown event condition %u for slot %u ep %u , HC probably busted\n",
 			  trb_comp_code, slot_id, ep_index);
-		goto cleanup;
+		if (ep->skip)
+			break;
+		return 0;
 	}
 
 	do {
@@ -2834,14 +2840,14 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		 */
 		if (!ep_seg && (trb_comp_code == COMP_STOPPED ||
 			   trb_comp_code == COMP_STOPPED_LENGTH_INVALID)) {
-			goto cleanup;
+			continue;
 		}
 
 		if (!ep_seg) {
 
 			if (ep->skip && usb_endpoint_xfer_isoc(&td->urb->ep->desc)) {
 				skip_isoc_td(xhci, td, ep, status);
-				goto cleanup;
+				continue;
 			}
 
 			/*
@@ -2926,19 +2932,17 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 							      trb_comp_code))
 				xhci_handle_halted_endpoint(xhci, ep, td,
 							    EP_HARD_RESET);
-			goto cleanup;
-		}
-
-		td->status = status;
+		} else {
+			td->status = status;
 
-		/* update the urb's actual_length and give back to the core */
-		if (usb_endpoint_xfer_control(&td->urb->ep->desc))
-			process_ctrl_td(xhci, ep, ep_ring, td, ep_trb, event);
-		else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc))
-			process_isoc_td(xhci, ep, ep_ring, td, ep_trb, event);
-		else
-			process_bulk_intr_td(xhci, ep, ep_ring, td, ep_trb, event);
-cleanup:;
+			/* update the urb's actual_length and give back to the core */
+			if (usb_endpoint_xfer_control(&td->urb->ep->desc))
+				process_ctrl_td(xhci, ep, ep_ring, td, ep_trb, event);
+			else if (usb_endpoint_xfer_isoc(&td->urb->ep->desc))
+				process_isoc_td(xhci, ep, ep_ring, td, ep_trb, event);
+			else
+				process_bulk_intr_td(xhci, ep, ep_ring, td, ep_trb, event);
+		}
 	/*
 	 * If ep->skip is set, it means there are missed tds on the
 	 * endpoint ring need to take care of.