usb: xhci: add 'goto' for halted endpoint check in handle_tx_event()

Add 'goto' statement for a halted endpoint, streamlining the error
handling process. In future handle_tx_event() changes this 'goto'
statement will have more uses.

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

@@ -2788,10 +2788,9 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 				xhci_dbg(xhci, "td_list is empty while skip flag set. Clear skip flag for slot %u ep %u.\n",
 					 slot_id, ep_index);
 			}
-			if (xhci_halted_host_endpoint(ep_ctx, trb_comp_code))
-				xhci_handle_halted_endpoint(xhci, ep, NULL, EP_HARD_RESET);
 
-			return 0;
+			td = NULL;
+			goto check_endpoint_halted;
 		}
 
 		td = list_first_entry(&ep_ring->td_list, struct xhci_td,
@@ -2899,20 +2898,22 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 	 * indefinitely.
 	 */
 
-	if (trb_is_noop(ep_trb)) {
-		if (xhci_halted_host_endpoint(ep_ctx, trb_comp_code))
-			xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET);
-	} else {
-		td->status = status;
+	if (trb_is_noop(ep_trb))
+		goto check_endpoint_halted;
 
-		/* 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);
-	}
+	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);
+
+check_endpoint_halted:
+	if (xhci_halted_host_endpoint(ep_ctx, trb_comp_code))
+		xhci_handle_halted_endpoint(xhci, ep, td, EP_HARD_RESET);
 
 	return 0;