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kernel: fix usb interface on 3G dwm-158 modem 

The current option driver binds to the usb interface 2,3,4,5.
But the interface 4 and 5 doesn't answer to the AT commands.
On the new openwrt configuration the wwan script select the 5th
interface as control interface, failing to establish the
3G connection.

Backport the fix for the problem.

Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
openwrt-18.06
Giuseppe Lippolis 2018-04-20 19:00:33 +02:00 committed by Mathias Kresin
parent 0b20490207
commit 78666c7ba0
1 changed files with 42 additions and 0 deletions
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42
target/linux/generic/backport-4.14/030-USB-serial-option-fix-dwm-158-3g-modem-interface.patch Normal file
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@ -0,0 +1,42 @@
From ebe37f322acbb95966094cb2b0fff6e44b5893a6 Mon Sep 17 00:00:00 2001
From: Giuseppe Lippolis <giu.lippolis@gmail.com>
Date: Mon, 23 Apr 2018 09:03:06 +0200
Subject: [PATCH] USB: serial: option: fix dwm-158 3g modem interface
The dwm-158 interface 4 and 5 doesn't answer to the AT commands
and doesn't appears a option interface.
Tested on openwrt distribution (kernel 4.14 using the old blacklist
definitions).
Lars Melin also writes:
Blacklisting interface 4 and 5 is correct because:
MI_00 D-Link Mobile Broadband Device (cdc_ether)
MI_02 D-Link HSPA+DataCard Diagnostics Interface (also ppp modem)
MI_03 D-Link HSPA+DataCard NMEA Device
MI_04 D-Link HSPA+DataCard Speech Port
MI_05 D-Link HSPA+DataCard Debug Port
MI_06 USB Mass Storage Device
Signed-off-by: Giuseppe Lippolis <giu.lippolis@gmail.com>
[ johan: add Lars's comment on the interface layout ]
Cc: Lars Melin <larsm17@gmail.com>
Cc: stable <stable@vger.kernel.org> # c3a65808f04a
Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/usb/serial/option.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -2046,7 +2046,8 @@ static const struct usb_device_id option
{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d01, 0xff) }, /* D-Link DWM-156 (variant) */
{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d02, 0xff) },
{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d03, 0xff) },
- { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d04, 0xff) }, /* D-Link DWM-158 */
+ { USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d04, 0xff), /* D-Link DWM-158 */
+ .driver_info = (kernel_ulong_t)&cinterion_rmnet2_blacklist },
{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7d0e, 0xff) }, /* D-Link DWM-157 C1 */
{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7e19, 0xff), /* D-Link DWM-221 B1 */
.driver_info = (kernel_ulong_t)&net_intf4_blacklist },