Input: joydev - blacklist digitizers

BTN_TOUCH is not set by the wacom driver which causes it to be handled by the
joydev driver while the resulting device is broken. This causes problems with
applications that try to use a joystick device.

Ubuntu BugLink: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/300143

Signed-off-by: Tim Cole <tim.cole@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Amit Kucheria <amit.kucheria@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/joydev.c

@@ -843,7 +843,13 @@ static const struct input_device_id joydev_blacklist[] = {
 				INPUT_DEVICE_ID_MATCH_KEYBIT,
 		.evbit = { BIT_MASK(EV_KEY) },
 		.keybit = { [BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH) },
-	},	/* Avoid itouchpads, touchscreens and tablets */
+	},	/* Avoid itouchpads and touchscreens */
+	{
+		.flags = INPUT_DEVICE_ID_MATCH_EVBIT |
+				INPUT_DEVICE_ID_MATCH_KEYBIT,
+		.evbit = { BIT_MASK(EV_KEY) },
+		.keybit = { [BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_DIGI) },
+	},	/* Avoid tablets, digitisers and similar devices */
 	{ }	/* Terminating entry */
 };