Index: ppp_tty.c
===================================================================
RCS file: /home/source/dragonfly/cvs/src/sys/net/ppp_layer/ppp_tty.c,v
retrieving revision 1.15
diff -u -p -r1.15 ppp_tty.c
--- ppp_tty.c	14 Jan 2006 11:05:18 -0000	1.15
+++ ppp_tty.c	28 Jan 2006 05:05:44 -0000
@@ -322,7 +322,7 @@ pppread(struct tty *tp, struct uio *uio,
      * Loop waiting for input, checking that nothing disasterous
      * happens in the meantime.
      */
-    crit_exit();
+    crit_enter();
     for (;;) {
 	if (tp != (struct tty *) sc->sc_devp || tp->t_line != PPPDISC) {
 	    crit_exit();