--- src/sys/dev/usbmisc/ulpt/ulpt.c	2004/12/24 04:52:19	1.11
+++ src/sys/dev/usbmisc/ulpt/ulpt.c	2005/06/02 20:40:58	1.12
@@ -61,6 +61,7 @@
 #include <sys/conf.h>
 #include <sys/syslog.h>
 #include <sys/sysctl.h>
+#include <sys/thread2.h>
 
 #include <bus/usb/usb.h>
 #include <bus/usb/usbdi.h>
@@ -375,7 +376,6 @@ ulpt_activate(device_ptr_t self, enum de
 USB_DETACH(ulpt)
 {
 	USB_DETACH_START(ulpt, sc);
-	int s;
 #if defined(__NetBSD__) || defined(__OpenBSD__)
 	int maj, mn;
 #endif
@@ -397,7 +397,7 @@ USB_DETACH(ulpt)
 	 * close things down.
 	 */
 
-	s = splusb();
+	crit_enter();
 	--sc->sc_refcnt;
 	if (sc->sc_refcnt >= 0) {
 		printf("%s: waiting for idle\n", USBDEVNAME(sc->sc_dev));
@@ -405,7 +405,7 @@ USB_DETACH(ulpt)
 			usb_detach_wait(USBDEV(sc->sc_dev));
 		printf("%s: idle wait done\n", USBDEVNAME(sc->sc_dev));
 	}
-	splx(s);
+	crit_exit();
 
 #if defined(__NetBSD__) || defined(__OpenBSD__)
 	/* locate the major number */