| From 4897807753e078655a78de39ed76044d784f3e63 Mon Sep 17 00:00:00 2001 |
| From: Hannu Hartikainen <hannu@hrtk.in> |
| Date: Tue, 22 Jun 2021 17:14:54 +0300 |
| Subject: USB: cdc-acm: blacklist Heimann USB Appset device |
| |
| From: Hannu Hartikainen <hannu@hrtk.in> |
| |
| commit 4897807753e078655a78de39ed76044d784f3e63 upstream. |
| |
| The device (32a7:0000 Heimann Sensor GmbH USB appset demo) claims to be |
| a CDC-ACM device in its descriptors but in fact is not. If it is run |
| with echo disabled it returns garbled data, probably due to something |
| that happens in the TTY layer. And when run with echo enabled (the |
| default), it will mess up the calibration data of the sensor the first |
| time any data is sent to the device. |
| |
| In short, I had a bad time after connecting the sensor and trying to get |
| it to work. I hope blacklisting it in the cdc-acm driver will save |
| someone else a bit of trouble. |
| |
| Signed-off-by: Hannu Hartikainen <hannu@hrtk.in> |
| Cc: stable <stable@vger.kernel.org> |
| Link: https://lore.kernel.org/r/20210622141454.337948-1-hannu@hrtk.in |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| 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 |
| @@ -1948,6 +1948,11 @@ static const struct usb_device_id acm_id |
| .driver_info = IGNORE_DEVICE, |
| }, |
| |
| + /* Exclude Heimann Sensor GmbH USB appset demo */ |
| + { USB_DEVICE(0x32a7, 0x0000), |
| + .driver_info = IGNORE_DEVICE, |
| + }, |
| + |
| /* control interfaces without any protocol set */ |
| { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, |
| USB_CDC_PROTO_NONE) }, |