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-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
