From b5e555d74e0afb8034aeadb0592d030b4860556a Mon Sep 17 00:00:00 2001
From: Miod Vallat <miod@cvs.openbsd.org>
Date: Sun, 25 Jan 2009 13:49:50 +0000
Subject: Behave correctly in interrupt handlers if no tty has been allocated
 yet (this was supposed to have been fixed in r1.25, but there was still a
 missing check).

---
 sys/arch/hp300/dev/dca.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

(limited to 'sys/arch/hp300')

diff --git a/sys/arch/hp300/dev/dca.c b/sys/arch/hp300/dev/dca.c
index f44ef867920..0c5a2891b77 100644
--- a/sys/arch/hp300/dev/dca.c
+++ b/sys/arch/hp300/dev/dca.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: dca.c,v 1.33 2008/01/23 16:37:56 jsing Exp $	*/
+/*	$OpenBSD: dca.c,v 1.34 2009/01/25 13:49:49 miod Exp $	*/
 /*	$NetBSD: dca.c,v 1.35 1997/05/05 20:58:18 thorpej Exp $	*/
 
 /*
@@ -568,8 +568,9 @@ dcaintr(arg)
 					fifoin[fifocnt]++;
 #endif
 			}
-			if (!iflowdone && (tp->t_cflag&CRTS_IFLOW) &&
-			    tp->t_rawq.c_cc > TTYHOG/2) {
+			if (iflowdone == 0 && tp != NULL &&
+			    (tp->t_cflag & CRTS_IFLOW) &&
+			    tp->t_rawq.c_cc > (TTYHOG / 2)) {
 				dca->dca_mcr &= ~MCR_RTS;
 				iflowdone = 1;
 			}
-- 
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