From bfbc1f09d4834699050e5f75f46a0f6e1f72e2d4 Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Sat, 26 Feb 1994 00:04:03 +0000
Subject: [PATCH] RTS shouldn't be touched unless CS_RTS_IFLOW is set.

---
 sys/dev/sio/sio.c  | 5 +++--
 sys/i386/isa/sio.c | 5 +++--
 sys/isa/sio.c      | 5 +++--
 3 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index 6bcee349704b..f17f6ae131a9 100644
--- a/sys/dev/sio/sio.c
+++ b/sys/dev/sio/sio.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)com.c	7.5 (Berkeley) 5/16/91
- *	$Id: sio.c,v 1.28 1994/02/07 18:37:21 ache Exp $
+ *	$Id: sio.c,v 1.29 1994/02/24 16:39:48 phk Exp $
  */
 
 #include "sio.h"
@@ -1243,7 +1243,8 @@ repeat:
 			 * of input, so enable RTS if it is now disabled and
 			 * there is room in the high-level buffer.
 			 */
-			if (!(com->mcr_image & MCR_RTS)
+			if ((com->state & CS_RTS_IFLOW)
+			    && !(com->mcr_image & MCR_RTS)
 			    && !(tp->t_state & TS_RTS_IFLOW))
 				outb(com->modem_ctl_port,
 				     com->mcr_image |= MCR_RTS);
diff --git a/sys/i386/isa/sio.c b/sys/i386/isa/sio.c
index 6bcee349704b..f17f6ae131a9 100644
--- a/sys/i386/isa/sio.c
+++ b/sys/i386/isa/sio.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)com.c	7.5 (Berkeley) 5/16/91
- *	$Id: sio.c,v 1.28 1994/02/07 18:37:21 ache Exp $
+ *	$Id: sio.c,v 1.29 1994/02/24 16:39:48 phk Exp $
  */
 
 #include "sio.h"
@@ -1243,7 +1243,8 @@ repeat:
 			 * of input, so enable RTS if it is now disabled and
 			 * there is room in the high-level buffer.
 			 */
-			if (!(com->mcr_image & MCR_RTS)
+			if ((com->state & CS_RTS_IFLOW)
+			    && !(com->mcr_image & MCR_RTS)
 			    && !(tp->t_state & TS_RTS_IFLOW))
 				outb(com->modem_ctl_port,
 				     com->mcr_image |= MCR_RTS);
diff --git a/sys/isa/sio.c b/sys/isa/sio.c
index 6bcee349704b..f17f6ae131a9 100644
--- a/sys/isa/sio.c
+++ b/sys/isa/sio.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)com.c	7.5 (Berkeley) 5/16/91
- *	$Id: sio.c,v 1.28 1994/02/07 18:37:21 ache Exp $
+ *	$Id: sio.c,v 1.29 1994/02/24 16:39:48 phk Exp $
  */
 
 #include "sio.h"
@@ -1243,7 +1243,8 @@ repeat:
 			 * of input, so enable RTS if it is now disabled and
 			 * there is room in the high-level buffer.
 			 */
-			if (!(com->mcr_image & MCR_RTS)
+			if ((com->state & CS_RTS_IFLOW)
+			    && !(com->mcr_image & MCR_RTS)
 			    && !(tp->t_state & TS_RTS_IFLOW))
 				outb(com->modem_ctl_port,
 				     com->mcr_image |= MCR_RTS);