From 1d0d6df02750b4a6f466768cbfbf860e24f4c8d4 Mon Sep 17 00:00:00 2001 From: Ping Cheng Date: Mon, 25 Nov 2013 18:43:45 -0800 Subject: [PATCH] Input: wacom - make sure touch_max is set for touch devices Old single touch Tablet PCs do not have touch_max set at wacom_features. Since touch device at lease supports one finger, assign touch_max to 1 when touch usage is defined in its HID Descriptor and touch_max is not pre-defined. Tested-by: Jason Gerecke Signed-off-by: Ping Cheng Reviewed-by: Chris Bagwell Signed-off-by: Dmitry Torokhov --- drivers/input/tablet/wacom_sys.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index 8a90da11365f..3d71b608330e 100644 --- a/drivers/input/tablet/wacom_sys.c +++ b/drivers/input/tablet/wacom_sys.c @@ -304,7 +304,7 @@ static int wacom_parse_hid(struct usb_interface *intf, struct usb_device *dev = interface_to_usbdev(intf); char limit = 0; /* result has to be defined as int for some devices */ - int result = 0; + int result = 0, touch_max = 0; int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0; unsigned char *report; @@ -351,7 +351,8 @@ static int wacom_parse_hid(struct usb_interface *intf, if (usage == WCM_DESKTOP) { if (finger) { features->device_type = BTN_TOOL_FINGER; - + /* touch device at least supports one touch point */ + touch_max = 1; switch (features->type) { case TABLETPC2FG: features->pktlen = WACOM_PKGLEN_TPC2FG; @@ -504,6 +505,8 @@ static int wacom_parse_hid(struct usb_interface *intf, } out: + if (!features->touch_max && touch_max) + features->touch_max = touch_max; result = 0; kfree(report); return result;