Input: alps - process_bitmap: fix counting of high point bits
alps_process_bitmap was resetting the point bit-count as soon as it saw
2 0 bits in a row. This means that unless the high point actually is at
the end of the bitmap, it would always get its num_bits set to 0.
Instead reset num_bits to 0 on a 0->1 transition, so that with > 2 fingers
we only count the number of bits occupied by the highest finger.
Signed-off-by: Hans de Goede <hdegoede@redhat.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 c6af590..5b35f4f 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -342,14 +342,13 @@
if (bit) {
if (!prev_bit) {
point->start_bit = i;
+ point->num_bits = 0;
(*fingers)++;
}
point->num_bits++;
} else {
if (prev_bit)
point = high;
- else
- point->num_bits = 0;
}
prev_bit = bit;
}