diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2014-07-25 22:42:53 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-07-26 14:03:15 -0700 |
| commit | 28835f4540564e6319028c9c1aeadf16604bed9c (patch) | |
| tree | c9bea32a138b7e88b4313914cf73c57a41cb0069 | |
| parent | 105affbfd588d5aec4171234051f7d589f7e62c1 (diff) | |
Input: alps - process_bitmap: round down when spreading adjescent fingers over 2 points
This fixes 2 fingers at the same height or width on the touchpad getting
reported at different y / x coordinates.
Note num_bits is always at least 1.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | drivers/input/mouse/alps.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c index 5b35f4fc4d2f..1c9917828956 100644 --- a/drivers/input/mouse/alps.c +++ b/drivers/input/mouse/alps.c @@ -391,13 +391,13 @@ static int alps_process_bitmap(struct alps_data *priv, * adjacent fingers. Divide the single contact between the two points. */ if (fingers_x == 1) { - i = x_low.num_bits / 2; + i = (x_low.num_bits - 1) / 2; x_low.num_bits = x_low.num_bits - i; x_high.start_bit = x_low.start_bit + i; x_high.num_bits = max(i, 1); } if (fingers_y == 1) { - i = y_low.num_bits / 2; + i = (y_low.num_bits - 1) / 2; y_low.num_bits = y_low.num_bits - i; y_high.start_bit = y_low.start_bit + i; y_high.num_bits = max(i, 1); |