tree 1a440447e5f06059cc50bf16a310f6d5e34c9b0c
parent 1bcb49e663f88bccee35b8688e6a3da2bea31fd4
author Bjørn Mork <bjorn@mork.no> 1447676146 +0100
committer Johan Hovold <johan@kernel.org> 1447694947 +0100

USB: qcserial: Fix support for HP lt4112 LTE/HSPA+ Gobi 4G Modem

The DEVICE_HWI type was added under the faulty assumption that Huawei
devices based on Qualcomm chipsets and firmware use the static USB
interface numbering known from Gobi devices.  But this model does
not apply to Huawei devices like the HP branded lt4112 (Huawei me906e).
Huawei firmwares will dynamically assign interface numbers. Functions
are renumbered when the firmware is reconfigured.

Fix by changing the DEVICE_HWI type to use a simplified version
of Huawei's subclass + protocol scheme: Blacklisting known network
interface combinations and assuming the rest are serial.

Reported-and-tested-by: Muri Nicanor <muri+libqmi@immerda.ch>
Tested-by: Martin Hauke <mardnh@gmx.de>
Cc: <stable@vger.kernel.org>
Fixes: e7181d005e84 ("USB: qcserial: Add support for HP lt4112 LTE/HSPA+ Gobi 4G Modem")
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Johan Hovold <johan@kernel.org>