[PATCH v4] Goodix Fingerprint device is not a modem

[Yorick de Wid <ydewid@gmail.com>]

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@gmail.com>
---
v1 -> v3:
Moved the entry down to keep the VID/PID order.
v3 -> v4:
Patch description of device in question

 drivers/usb/class/cdc-acm.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 78190574581..2f4e5174e78 100644
--- 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_ids[] = {
 	.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) },
-- 
2.30.0