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 <niklas.neronin@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20240429140245.3955523-14-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 0f48f9befc942a02a69782490431b6f1477eac45..b395708c488c23fce600db2e81581ead6d6b2313 100644 (file)
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2727,7 +2727,9 @@ 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))
@@ -2735,7 +2737,9 @@ 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_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.