[PATCH v2 0/2] HID: lenovo-go: clean up USB assumption

[Louis Clinckx <clinckx.louis@gmail.com>]

These drivers' id_tables only match HID_USB_DEVICE() entries and the
code freely assumes a USB transport (to_usb_interface() on hdev->dev.parent,
endpoint access in raw_event). Make the assumption explicit at probe and
drop a NULL check that the compiler-level definition of to_usb_interface()
makes unreachable.

No functional change for the supported (USB) devices.

Louis Clinckx (2):
  HID: lenovo-go: reject non-USB transports in probe
  HID: lenovo-go: drop dead NULL check on to_usb_interface()

 drivers/hid/hid-lenovo-go-s.c | 11 ++++++-----
 drivers/hid/hid-lenovo-go.c   |  6 +++---
 2 files changed, 9 insertions(+), 8 deletions(-)

---
Changes since v1:
 - Resubmitted on linux-input as a quality fix per Benjamin's review of v1
   (sent to security@kernel.org; the HID_USB_DEVICE() id_table already
    filters BUS_USB, so no exploitable path).
 - Added patch 2 to remove the dead NULL check, at Derek's suggestion.

base-commit: 50897c955902c93ae71c38698abb910525ebdc89
--
2.39.5