From ae404e3427eed77c22e0c4df821ff9d978d9ac93 Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Sun, 27 Jun 2004 11:29:54 +0000
Subject: [PATCH] Guard against us having no tty pointer.

---
 sys/dev/sio/sio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index 1dbf3c811f6c..0ecdef798cc5 100644
--- a/sys/dev/sio/sio.c
+++ b/sys/dev/sio/sio.c
@@ -1875,7 +1875,8 @@ siointr1(com)
 					recv_data = 0;
 			}
 			++com->bytes_in;
-			if (com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar)
+			if (com->tp != NULL &&
+			    com->tp->t_hotchar != 0 && recv_data == com->tp->t_hotchar)
 				swi_sched(sio_fast_ih, 0);
 			ioptr = com->iptr;
 			if (ioptr >= com->ibufend)