[src/trunk]: src/sys/dev/pckbport Use the original right boundary when calcul...

[blymn <blymn%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5d6c1a5c2fb1
branches:  trunk
changeset: 364664:5d6c1a5c2fb1
user:      blymn <blymn%NetBSD.org@localhost>
date:      Mon Apr 04 07:04:20 2022 +0000

description:
Use the original right boundary when calculating the vertical scroll
region so the boundary does not creep left on each subsequent setting.
Thanks to Martin@ for the report.

diffstat:

 sys/dev/pckbport/synaptics.c |  8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diffs (36 lines):

diff -r 2e32672320ef -r 5d6c1a5c2fb1 sys/dev/pckbport/synaptics.c
--- a/sys/dev/pckbport/synaptics.c      Mon Apr 04 06:12:27 2022 +0000
+++ b/sys/dev/pckbport/synaptics.c      Mon Apr 04 07:04:20 2022 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: synaptics.c,v 1.77 2022/04/01 06:31:29 blymn Exp $     */
+/*     $NetBSD: synaptics.c,v 1.78 2022/04/04 07:04:20 blymn Exp $     */
 
 /*
  * Copyright (c) 2005, Steve C. Woodford
@@ -48,7 +48,7 @@
 #include "opt_pms.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.77 2022/04/01 06:31:29 blymn Exp $");
+__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.78 2022/04/04 07:04:20 blymn Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -255,7 +255,8 @@
 pms_synaptics_set_boundaries(void)
 {
        if (synaptics_vert_pct != synaptics_old_vert_pct ) {
-               synaptics_edge_right -= ((unsigned long) synaptics_vert_pct *
+               synaptics_edge_right = synaptics_actual_edge_right -
+                   ((unsigned long) synaptics_vert_pct *
                    (synaptics_actual_edge_right - synaptics_edge_left)) / 100;
                synaptics_old_vert_pct = synaptics_vert_pct;
                synaptics_old_vert_edge = synaptics_edge_right;
@@ -270,6 +271,7 @@
                            ((unsigned long) 100 * synaptics_edge_right) /
                            (synaptics_actual_edge_right - synaptics_edge_left);
                }
+               synaptics_old_vert_pct = synaptics_vert_pct;
                synaptics_old_vert_edge = synaptics_edge_right;
        }