Input: gtco - remove driver

The driver has its own HID descriptor parsing code, that had and still
has several issues discovered by syzbot and other tools. Ideally we
should move the driver over to the HID subsystem, so that it uses proven
parsing code.  However the devices in question are EOL, and GTCO is not
willing to extend resources for that, so let's simply remove the driver.

Note that our HID support has greatly improved over the last 10 years,
we may also consider reverting 6f8d9e26e7 ("hid-core.c: Adds all GTCO
CalComp Digitizers and InterWrite School Products to blacklist") and see
if GTCO devices actually work with normal HID drivers.

Link: https://lore.kernel.org/r/X8wbBtO5KidME17K@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

arch/powerpc/configs/ppc6xx_defconfig

@@ -579,7 +579,6 @@ CONFIG_JOYSTICK_XPAD_LEDS=y
 CONFIG_INPUT_TABLET=y
 CONFIG_TABLET_USB_ACECAD=m
 CONFIG_TABLET_USB_AIPTEK=m
-CONFIG_TABLET_USB_GTCO=m
 CONFIG_TABLET_USB_KBTAB=m
 CONFIG_INPUT_MISC=y
 CONFIG_INPUT_PCSPKR=m

drivers/input/tablet/Kconfig

@@ -38,18 +38,6 @@ config TABLET_USB_AIPTEK
 	  To compile this driver as a module, choose M here: the
 	  module will be called aiptek.
 
-config TABLET_USB_GTCO
-	tristate "GTCO CalComp/InterWrite USB Support"
-	depends on USB && INPUT
-	help
-	  Say Y here if you want to use the USB version of the GTCO
-	  CalComp/InterWrite Tablet.  Make sure to say Y to "Mouse support"
-	  (CONFIG_INPUT_MOUSEDEV) and/or "Event interface support"
-	  (CONFIG_INPUT_EVDEV) as well.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called gtco.
-
 config TABLET_USB_HANWANG
 	tristate "Hanwang Art Master III tablet support (USB)"
 	depends on USB_ARCH_HAS_HCD

drivers/input/tablet/Makefile

@@ -6,7 +6,6 @@
 
 obj-$(CONFIG_TABLET_USB_ACECAD)	+= acecad.o
 obj-$(CONFIG_TABLET_USB_AIPTEK)	+= aiptek.o
-obj-$(CONFIG_TABLET_USB_GTCO)	+= gtco.o
 obj-$(CONFIG_TABLET_USB_HANWANG) += hanwang.o
 obj-$(CONFIG_TABLET_USB_KBTAB)	+= kbtab.o
 obj-$(CONFIG_TABLET_USB_PEGASUS) += pegasus_notetaker.o

kernel/configs/android-recommended.config

@@ -111,7 +111,6 @@ CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_SUSPEND_TIME=y
 CONFIG_TABLET_USB_ACECAD=y
 CONFIG_TABLET_USB_AIPTEK=y
-CONFIG_TABLET_USB_GTCO=y
 CONFIG_TABLET_USB_HANWANG=y
 CONFIG_TABLET_USB_KBTAB=y
 CONFIG_TASKSTATS=y