This is a note to let you know that I've just added the patch titled Goodix Fingerprint device is not a modem to the 5.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: goodix-fingerprint-device-is-not-a-modem.patch and it can be found in the queue-5.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 4d8654e81db7346f915eca9f1aff18f385cab621 Mon Sep 17 00:00:00 2001 From: Yorick de Wid <ydewid@xxxxxxxxx> Date: Sat, 13 Feb 2021 15:49:02 +0100 Subject: Goodix Fingerprint device is not a modem From: Yorick de Wid <ydewid@xxxxxxxxx> commit 4d8654e81db7346f915eca9f1aff18f385cab621 upstream. The CDC ACM driver is false matching the Goodix Fingerprint device against the USB_CDC_ACM_PROTO_AT_V25TER. The Goodix Fingerprint device is a biometrics sensor that should be handled in user-space. libfprint has some support for Goodix fingerprint sensors, although not for this particular one. It is possible that the vendor allocates a PID per OEM (Lenovo, Dell etc). If this happens to be the case then more devices from the same vendor could potentially match the ACM modem module table. Signed-off-by: Yorick de Wid <ydewid@xxxxxxxxx> Cc: stable <stable@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20210213144901.53199-1-ydewid@xxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/class/cdc-acm.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1929,6 +1929,11 @@ static const struct usb_device_id acm_id .driver_info = SEND_ZERO_PACKET, }, + /* Exclude Goodix Fingerprint Reader */ + { USB_DEVICE(0x27c6, 0x5395), + .driver_info = IGNORE_DEVICE, + }, + /* control interfaces without any protocol set */ { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, USB_CDC_PROTO_NONE) }, Patches currently in stable-queue which might be from ydewid@xxxxxxxxx are queue-5.11/goodix-fingerprint-device-is-not-a-modem.patch