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USB: cdc-acm - blacklist IMS PCU device 

The IMS PCU (Passenger Control Unit) device used custom protocol over serial
line, so it is presenting itself as CDC ACM device.

Now that we have proper in-kernel driver for it we need to black-list the
device in cdc-acm driver.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
hifive-unleashed-5.1
Dmitry Torokhov 2013-02-02 11:02:14 -08:00
parent 628329d524
commit 1614265526
2 changed files with 14 additions and 0 deletions
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13
drivers/usb/class/cdc-acm.c
View File

@ -949,6 +949,10 @@ static int acm_probe(struct usb_interface *intf,
/* normal quirks */
quirks = (unsigned long)id->driver_info;
if (quirks == IGNORE_DEVICE)
return -ENODEV;
num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR;
/* handle quirks deadly to normal probing*/
@ -1650,6 +1654,15 @@ static const struct usb_device_id acm_ids[] = {
.driver_info = NO_DATA_INTERFACE,
},
#if IS_ENABLED(CONFIG_INPUT_IMS_PCU)
{ USB_DEVICE(0x04d8, 0x0082), /* Application mode */
.driver_info = IGNORE_DEVICE,
},
{ USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */
.driver_info = IGNORE_DEVICE,
},
#endif
/* control interfaces without any protocol set */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTO_NONE) },

1
drivers/usb/class/cdc-acm.h
View File

@ -128,3 +128,4 @@ struct acm {
#define NO_CAP_LINE 4
#define NOT_A_MODEM 8
#define NO_DATA_INTERFACE 16
#define IGNORE_DEVICE 32