From 668a7fffa9dc075f4a563fe22701cbf2be30c8c9 Mon Sep 17 00:00:00 2001
From: waltje <decwiz@yahoo.com>
Date: Tue, 5 Dec 2017 13:37:06 -0500
Subject: [PATCH] Fixed closing of non-open serial mouse (Altheos bug report.)

---
 src/mouse_serial.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/mouse_serial.c b/src/mouse_serial.c
index df5271ced..0d8d4a586 100644
--- a/src/mouse_serial.c
+++ b/src/mouse_serial.c
@@ -10,7 +10,7 @@
  *
  * TODO:	Add the Genius Serial Mouse.
  *
- * Version:	@(#)mouse_serial.c	1.0.14	2017/12/03
+ * Version:	@(#)mouse_serial.c	1.0.15	2017/12/05
  *
  * Author:	Fred N. van Kempen, <decwiz@yahoo.com>
  */
@@ -184,8 +184,10 @@ sermouse_poll(int x, int y, int z, int b, void *priv)
 #endif
 
     /* Send the packet to the bottom-half of the attached port. */
-    for (b=0; b<len; b++)
-	serial_write_fifo(dev->serial, buff[b]);
+    if (dev->serial != NULL) {
+	for (b=0; b<len; b++)
+		serial_write_fifo(dev->serial, buff[b]);
+    }
 
     return(0);
 }
@@ -197,8 +199,10 @@ sermouse_close(void *priv)
     mouse_t *dev = (mouse_t *)priv;
 
     /* Detach serial port from the mouse. */
-    dev->serial->rcr_callback = NULL;
-    dev->serial->rcr_callback_p = NULL;
+    if (dev->serial != NULL) {
+	dev->serial->rcr_callback = NULL;
+	dev->serial->rcr_callback_p = NULL;
+    }
 
     free(dev);
 }