diff options
| author | Ping Cheng <pinglinux@gmail.com> | 2013-11-25 18:43:45 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-31 10:05:16 -0700 |
| commit | 0d373d2a7918aeaea847e1c898d6088a93282e2a (patch) | |
| tree | 9cd8cf196d3660f77d4e66217e5bdf5b6a28bfc1 /drivers | |
| parent | bcf3331087895a5ec9d2bd31b758ecac505d87a9 (diff) | |
Input: wacom - make sure touch_max is set for touch devices
commit 1d0d6df02750b4a6f466768cbfbf860e24f4c8d4 upstream.
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 <killertofu@gmail.com>
Signed-off-by: Ping Cheng <pingc@wacom.com>
Reviewed-by: Chris Bagwell <chris@cnpbagwell.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/tablet/wacom_sys.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index 867e7c33ac55..5a6cba81a2a2 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; |