[PATCH v2] USB: serial: option: add support for ASR 1286:4e3c modem

[Michael Wyraz <michael@wyraz.de>]

The ASR modem used in the Tuoshi LT22M exposes an RNDIS function on
interfaces 0 and 1, a diagnostic port on interface 2, and AT ports on
interfaces 3 and 4. Match only the vendor-specific serial interfaces
so option does not bind to the RNDIS function.

Link: https://lore.kernel.org/all/d12635f9-9706-4dbd-8adb-d673c6a77202@wyraz.de/
Signed-off-by: Michael Wyraz <michael@wyraz.de>
---
 drivers/usb/serial/option.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 828b1be..f95788f 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2556,6 +2556,7 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, TOZED_PRODUCT_LT70C, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, UNISOC_PRODUCT_UIS7720, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(UNISOC_VENDOR_ID, LUAT_PRODUCT_AIR720U, 0xff, 0, 0) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1286, 0x4e3c, 0xff) },	/* ASR modem */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1bbb, 0x0530, 0xff),			/* TCL IK512 MBIM */
 	  .driver_info = NCTRL(1) },
 	{ USB_DEVICE_INTERFACE_CLASS(0x1bbb, 0x0640, 0xff),			/* TCL IK512 ECM */