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Commit 16142655 authored by Dmitry Torokhov's avatar Dmitry Torokhov
Browse files

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: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 628329d5

drivers/usb/class/cdc-acm.c

+13 −0
Original line number Diff line number Diff line
@@ -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) },

drivers/usb/class/cdc-acm.h

+1 −0
Original line number Diff line number Diff line
@@ -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