[4.2.y-ckt stable] Patch "qmi_wwan: fix entry for HP lt4112 LTE/HSPA+ Gobi 4G Module" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    qmi_wwan: fix entry for HP lt4112 LTE/HSPA+ Gobi 4G Module

to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue

This patch is scheduled to be released in version 4.2.8-ckt1.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 4.2.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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>From 899576546d407628e89d0562ea147e7e4fc75d66 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn at mork.no>
Date: Sun, 1 Nov 2015 01:34:50 +0100
Subject: qmi_wwan: fix entry for HP lt4112 LTE/HSPA+ Gobi 4G Module
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

commit 70910791731b5956171e1bfcad707766b8e18fee upstream.

The lt4112 is a HP branded Huawei me906e modem. Like other Huawei
modems, it does not have a fixed interface to function mapping.
Instead it uses a Huawei specific scheme: functions are mapped by
subclass and protocol.

However, the HP vendor ID is used for modems from many different
manufacturers using different schemes, so we cannot apply a generic
vendor rule like we do for the Huawei vendor ID.

Replace the previous lt4112 entry pointing to an arbitrary interface
number with a device specific subclass + protocol match.

Reported-and-tested-by: Muri Nicanor <muri+libqmi at immerda.ch>
Tested-by: Martin Hauke <mardnh at gmx.de>
Fixes: bb2bdeb83fb1 ("qmi_wwan: Add support for HP lt4112 LTE/HSPA+ Gobi 4G Modem")
Signed-off-by: Bjørn Mork <bjorn at mork.no>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/net/usb/qmi_wwan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index de27f51..628e3fb 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -539,6 +539,10 @@ static const struct usb_device_id products[] = {
 					      USB_CDC_PROTO_NONE),
 		.driver_info        = (unsigned long)&qmi_wwan_info,
 	},
+	{	/* HP lt4112 LTE/HSPA+ Gobi 4G Module (Huawei me906e) */
+		USB_DEVICE_AND_INTERFACE_INFO(0x03f0, 0x581d, USB_CLASS_VENDOR_SPEC, 1, 7),
+		.driver_info = (unsigned long)&qmi_wwan_info,
+	},

 	/* 3. Combined interface devices matching on interface number */
 	{QMI_FIXED_INTF(0x0408, 0xea42, 4)},	/* Yota / Megafon M100-1 */
@@ -791,7 +795,6 @@ static const struct usb_device_id products[] = {
 	{QMI_FIXED_INTF(0x413c, 0x81a8, 8)},	/* Dell Wireless 5808 Gobi(TM) 4G LTE Mobile Broadband Card */
 	{QMI_FIXED_INTF(0x413c, 0x81a9, 8)},	/* Dell Wireless 5808e Gobi(TM) 4G LTE Mobile Broadband Card */
 	{QMI_FIXED_INTF(0x03f0, 0x4e1d, 8)},	/* HP lt4111 LTE/EV-DO/HSPA+ Gobi 4G Module */
-	{QMI_FIXED_INTF(0x03f0, 0x581d, 4)},	/* HP lt4112 LTE/HSPA+ Gobi 4G Module (Huawei me906e) */

 	/* 4. Gobi 1000 devices */
 	{QMI_GOBI1K_DEVICE(0x05c6, 0x9212)},	/* Acer Gobi Modem Device */
--
1.9.1