[PATCH 2/3] Input: wacom - Don't discard bits from upper byte of pressure value

[Carl Worth]

The mask here previously discarded all but one bit of data from the
upper byte of the pressure value. That would be correct for a tablet
with at most 512 pressure values, but is incorrect for a tablet with
1024 or more pressure values.

We can support as many tablets as possible by simply not discarding
any of the bits from this byte.

Signed-off-by: Carl Worth <cworth@xxxxxxxxxx>
---
 drivers/input/tablet/wacom_wac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index 4958081..563f197 100644
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -1037,7 +1037,7 @@ static int wacom_tpc_pen(struct wacom_wac *wacom)
 		input_report_key(input, BTN_STYLUS2, data[1] & 0x10);
 		input_report_abs(input, ABS_X, le16_to_cpup((__le16 *)&data[2]));
 		input_report_abs(input, ABS_Y, le16_to_cpup((__le16 *)&data[4]));
-		pressure = ((data[7] & 0x01) << 8) | data[6];
+		pressure = (data[7] << 8) | data[6];
 		if (pressure < 0)
 			pressure = features->pressure_max + pressure + 1;
 		input_report_abs(input, ABS_PRESSURE, pressure);
-- 
1.9.0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/