Input: alps - do not reduce trackpoint speed by half

On some v7 devices (e.g. Lenovo-E550) the deltas reported are typically
only in the 0-1 range dividing this by 2 results in a range of 0-0.

And even for v7 devices where this does not lead to making the trackstick
entirely unusable, it makes it twice as slow as before we added v7 support
and were using the ps/2 mouse emulation of the dual point setup.

If some kind of generic slowdown is actually necessary for some devices,
then that belongs in userspace, not in the kernel.

Cc: stable@vger.kernel.org
Reported-and-tested-by: Rico Moorman <rico.moorman@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 7752bd59d4b7d529218dad186c155a91a9922ad1..a353b7de6d22e91a52378cd4c106b17cafc26a07 100644 (file)
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -1063,9 +1063,8 @@ static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
        right = (packet[1] & 0x02) >> 1;
        middle = (packet[1] & 0x04) >> 2;
 
-       /* Divide 2 since trackpoint's speed is too fast */
-       input_report_rel(dev2, REL_X, (char)x / 2);
-       input_report_rel(dev2, REL_Y, -((char)y / 2));
+       input_report_rel(dev2, REL_X, (char)x);
+       input_report_rel(dev2, REL_Y, -((char)y));
 
        input_report_key(dev2, BTN_LEFT, left);
        input_report_key(dev2, BTN_RIGHT, right);