From 6a8d0ac969649bda0c93b200e5586bfeecb1f7f6 Mon Sep 17 00:00:00 2001
From: Andrew Thompson <thompsa@FreeBSD.org>
Date: Thu, 29 Oct 2009 23:26:29 +0000
Subject: [PATCH] MFC r198152

 Only poll ukbd if KDB is active.
---
 sys/dev/usb/input/ukbd.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/dev/usb/input/ukbd.c b/sys/dev/usb/input/ukbd.c
index 1687755e33e..8378cafc73d 100644
--- a/sys/dev/usb/input/ukbd.c
+++ b/sys/dev/usb/input/ukbd.c
@@ -67,6 +67,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/callout.h>
 #include <sys/malloc.h>
 #include <sys/priv.h>
+#include <sys/kdb.h>
 
 #include <dev/usb/usb.h>
 #include <dev/usb/usbdi.h>
@@ -328,6 +329,9 @@ ukbd_do_poll(struct ukbd_softc *sc, uint8_t wait)
 {
 	DPRINTFN(2, "polling\n");
 
+	if (kdb_active == 0)
+		return;		/* Only poll if KDB is active */
+
 	while (sc->sc_inputs == 0) {
 
 		usbd_transfer_poll(sc->sc_xfer, UKBD_N_TRANSFER);