4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hans de Goede hdegoede@redhat.com
commit edfc3722cfef4217c7fe92b272cbe0288ba1ff57 upstream.
The Toshiba Click Mini uses an i2c attached keyboard/touchpad combo (single i2c_hid device for both) which has a vid:pid of 04F3:0401, which is also used by a bunch of Elan touchpads which are handled by the drivers/input/mouse/elan_i2c driver, but that driver deals with pure touchpads and does not work for a combo device such as the one on the Toshiba Click Mini.
The combo on the Mini has an ACPI id of ELAN0800, which is not claimed by the elan_i2c driver, so check for that and if it is found do not ignore the device. This fixes the keyboard/touchpad combo on the Mini not working (although with the touchpad in mouse emulation mode).
Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/hid/hid-core.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
--- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -2643,7 +2643,6 @@ static const struct hid_device_id hid_ig { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EARTHMATE) }, { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) }, { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, 0x0400) }, - { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, 0x0401) }, { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) }, { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) }, { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) }, @@ -2913,6 +2912,17 @@ bool hid_ignore(struct hid_device *hdev) strncmp(hdev->name, "www.masterkit.ru MA901", 22) == 0) return true; break; + case USB_VENDOR_ID_ELAN: + /* + * Many Elan devices have a product id of 0x0401 and are handled + * by the elan_i2c input driver. But the ACPI HID ELAN0800 dev + * is not (and cannot be) handled by that driver -> + * Ignore all 0x0401 devs except for the ELAN0800 dev. + */ + if (hdev->product == 0x0401 && + strncmp(hdev->name, "ELAN0800", 8) != 0) + return true; + break; }
if (hdev->type == HID_TYPE_USBMOUSE &&