xhci: add trace for debug messages related to endpoint reset

This patch defines a new trace event, which is called xhci_dbg_reset_ep
and belongs in the event class xhci_log_msg, and adds tracepoints that
trace the debug messages associated with resetting an endpoint after
the reception of a STALL packet.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index e88e877..3393ce7 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1151,7 +1151,8 @@
 	/* This command will only fail if the endpoint wasn't halted,
 	 * but we don't care.
 	 */
-	xhci_dbg(xhci, "Ignoring reset ep completion code of %u\n",
+	xhci_dbg_trace(xhci, trace_xhci_dbg_reset_ep,
+		"Ignoring reset ep completion code of %u",
 		 GET_COMP_CODE(le32_to_cpu(event->status)));
 
 	/* HW with the reset endpoint quirk needs to have a configure endpoint