From: Jason Gerecke Date: Tue, 13 Mar 2012 05:15:43 +0000 (-0700) Subject: Input: wacom - fix physical size calculation for 3rd-gen Bamboo X-Git-Tag: v3.4-rc1~130^2~1 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=24e3e5ae1e4c2a3a32f5b1f96b4e3fd721806acd;p=karo-tx-linux.git Input: wacom - fix physical size calculation for 3rd-gen Bamboo 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 Reviewed-by: Chris Bagwell Signed-off-by: Dmitry Torokhov --- diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index 7e63183a6c68..b59058998417 100644 --- a/drivers/input/tablet/wacom_sys.c +++ b/drivers/input/tablet/wacom_sys.c @@ -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]);