xhci: remove unused stopped_td pointer

We no longer keep track of where we stopped in a stopped_td pointer.
We get the ring dequeue pointer from the endpoint or stream context

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

drivers/usb/host/xhci-ring.c

@@ -715,7 +715,6 @@ static void xhci_handle_cmd_stop_ep(struct xhci_hcd *xhci, int slot_id,
 
 	if (list_empty(&ep->cancelled_td_list)) {
 		xhci_stop_watchdog_timer_in_irq(xhci, ep);
-		ep->stopped_td = NULL;
 		ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
 		return;
 	}
@@ -780,8 +779,6 @@ remove_finished_td:
 		ring_doorbell_for_active_rings(xhci, slot_id, ep_index);
 	}
 
-	ep->stopped_td = NULL;
-
 	/*
 	 * Drop the lock and complete the URBs in the cancelled TD list.
 	 * New TDs to be cancelled might be added to the end of the list before
@@ -1935,7 +1932,6 @@ static int finish_td(struct xhci_hcd *xhci, struct xhci_td *td,
 		 * stopped TDs.  A stopped TD may be restarted, so don't update
 		 * the ring dequeue pointer or take this TD off any lists yet.
 		 */
-		ep->stopped_td = td;
 		return 0;
 	}
 	if (trb_comp_code == COMP_STALL_ERROR ||

drivers/usb/host/xhci.h

@@ -924,7 +924,6 @@ struct xhci_virt_ep {
 #define EP_GETTING_NO_STREAMS	(1 << 5)
 	/* ----  Related to URB cancellation ---- */
 	struct list_head	cancelled_td_list;
-	struct xhci_td		*stopped_td;
 	unsigned int		stopped_stream;
 	/* Watchdog timer for stop endpoint command to cancel URBs */
 	struct timer_list	stop_cmd_timer;