[src/trunk]: src/sys/dev/pckbport Fix clamping of deltas so it works for both...

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

details:   https://anonhg.NetBSD.org/src/rev/208e56de4848
branches:  trunk
changeset: 836787:208e56de4848
user:      blymn <blymn%NetBSD.org@localhost>
date:      Tue Nov 06 08:55:02 2018 +0000

description:
Fix clamping of deltas so it works for both positive and negative deltas.

diffstat:

 sys/dev/pckbport/synaptics.c |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (33 lines):

diff -r df3d27ec2648 -r 208e56de4848 sys/dev/pckbport/synaptics.c
--- a/sys/dev/pckbport/synaptics.c      Tue Nov 06 06:17:29 2018 +0000
+++ b/sys/dev/pckbport/synaptics.c      Tue Nov 06 08:55:02 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: synaptics.c,v 1.42 2018/07/14 00:47:33 maya Exp $      */
+/*     $NetBSD: synaptics.c,v 1.43 2018/11/06 08:55:02 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 1.42 2018/07/14 00:47:33 maya Exp $");
+__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.43 2018/11/06 08:55:02 blymn Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1485,10 +1485,10 @@
        /*
         * Clamp deltas to specified maximums.
         */
-       if (dx > synaptics_max_speed_x)
-               dx = synaptics_max_speed_x;
-       if (dy > synaptics_max_speed_y)
-               dy = synaptics_max_speed_y;
+       if (abs(dx) > synaptics_max_speed_x)
+               dx = ((dx >= 0)? 1 : -1) * synaptics_max_speed_x;
+       if (abs(dy) > synaptics_max_speed_y)
+               dy = ((dy >= 0)? 1 : -1) * synaptics_max_speed_y;
 
        *dxp = dx;
        *dyp = dy;