Commit 105affbf authored Jul 25, 2014 by Hans de Goede Committed by Dmitry Torokhov Jul 26, 2014

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>

parent 036e6c7b

drivers/input/mouse/alps.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -342,14 +342,13 @@ static void alps_get_bitmap_points(unsigned int map,
		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;
		}