usb: xhci: remove duplicate TRB_TO_SLOT_ID() calls

Remove unnecessary repeated calls to TRB_TO_SLOT_ID(). The slot ID is
stored in the 'slot_id' variable at the function's start.

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/20240429140245.3955523-18-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Epicurius

drivers/usb/host/xhci-ring.c

@@ -2723,20 +2723,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 		 */
 		xhci_dbg(xhci, "underrun event on endpoint\n");
 		if (!list_empty(&ep_ring->td_list))
-			xhci_dbg(xhci, "Underrun Event for slot %d ep %d "
-					"still with TDs queued?\n",
-				 TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
-				 ep_index);
+			xhci_dbg(xhci, "Underrun Event for slot %u ep %d still with TDs queued?\n",
+				 slot_id, ep_index);
 		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);
+			xhci_dbg(xhci, "Overrun Event for slot %u ep %d still with TDs queued?\n",
+				 slot_id, ep_index);
 		if (ep->skip)
 			break;
 		return 0;
@@ -2795,9 +2791,8 @@ static int handle_tx_event(struct xhci_hcd *xhci,
 			if (!(trb_comp_code == COMP_STOPPED ||
 			      trb_comp_code == COMP_STOPPED_LENGTH_INVALID ||
 			      ep_ring->last_td_was_short)) {
-				xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
-						TRB_TO_SLOT_ID(le32_to_cpu(event->flags)),
-						ep_index);
+				xhci_warn(xhci, "WARN Event TRB for slot %u ep %d with no TDs queued?\n",
+					  slot_id, ep_index);
 			}
 			if (ep->skip) {
 				ep->skip = false;