From 70c0dd79d8f45eb2309de26acd58a4b996bf7fb8 Mon Sep 17 00:00:00 2001
From: "Andrey A. Chernov" <ache@FreeBSD.org>
Date: Fri, 25 Mar 1994 15:10:50 +0000
Subject: [PATCH] Fix false carrier detection on incoming bidir port.

---
 sys/dev/sio/sio.c  | 4 +++-
 sys/i386/isa/sio.c | 4 +++-
 sys/isa/sio.c      | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index a90d45a94ba..46afee098bf 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 1.37 1994/03/21 22:19:56 ache Exp $
+ *	$Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
  */
 
 #include "sio.h"
@@ -818,6 +818,8 @@ comhardclose(com)
 				tsleep((caddr_t)&com->dtr_wait, TTIPRI,
 				       "sioclose", com->dtr_wait);
 		}
+		com->last_modem_status =
+		com->prev_modem_status = inb(com->modem_status_port);
 	}
 
 #ifdef COM_BIDIR
diff --git a/sys/i386/isa/sio.c b/sys/i386/isa/sio.c
index a90d45a94ba..46afee098bf 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 1.37 1994/03/21 22:19:56 ache Exp $
+ *	$Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
  */
 
 #include "sio.h"
@@ -818,6 +818,8 @@ comhardclose(com)
 				tsleep((caddr_t)&com->dtr_wait, TTIPRI,
 				       "sioclose", com->dtr_wait);
 		}
+		com->last_modem_status =
+		com->prev_modem_status = inb(com->modem_status_port);
 	}
 
 #ifdef COM_BIDIR
diff --git a/sys/isa/sio.c b/sys/isa/sio.c
index a90d45a94ba..46afee098bf 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 1.37 1994/03/21 22:19:56 ache Exp $
+ *	$Id: sio.c,v 1.38 1994/03/23 17:28:35 ache Exp $
  */
 
 #include "sio.h"
@@ -818,6 +818,8 @@ comhardclose(com)
 				tsleep((caddr_t)&com->dtr_wait, TTIPRI,
 				       "sioclose", com->dtr_wait);
 		}
+		com->last_modem_status =
+		com->prev_modem_status = inb(com->modem_status_port);
 	}
 
 #ifdef COM_BIDIR