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Input: wacom - fix physical size calculation for 3rd-gen Bamboo

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This calculation determines the physical dimensions of the tablet,
used later on in calculate_touch_res to obtain the touch sensor
resolution.

Instead of dividing the logical size by the resolution, the current
code performs a multiplication. This doesn't pose a problem for the
3rd-gen Bamboo since the resolution and scale factor happen to be
identical, but will produce an incorrect result for other cases.

Signed-off-by: Jason Gerecke <killertofu@gmail.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Jason Gerecke 2012-03-12 22:15:43 -07:00 committed by Dmitry Torokhov
parent 7a0a1dfe9b
commit 24e3e5ae1e
1 changed files with 2 additions and 2 deletions
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4
drivers/input/tablet/wacom_sys.c
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@ -184,9 +184,9 @@ static int wacom_parse_logical_collection(unsigned char *report,
* data before its overwritten.
*/
features->x_phy =
(features->x_max * features->x_resolution) / 100;
(features->x_max * 100) / features->x_resolution;
features->y_phy =
(features->y_max * features->y_resolution) / 100;
(features->y_max * 100) / features->y_resolution;
features->x_max = features->y_max =
get_unaligned_le16(&report[10]);