RE: [MM] Huawei E1820 and NDISDUP

[Graham Inggs <graham inggs uct ac za>]

> I think we should add this device ID to qmi_wwan then, which also is
> likely to fix the mac address problem.

Agreed, switching to qmi_wwan worked perfectly.  For reference, the commands were:

modprobe qmi_wwan
echo 2-5:1.1 >/sys/bus/usb/drivers/cdc_ether/unbind
echo 12d1 14ac >/sys/bus/usb/drivers/qmi_wwan/new_id

'usb-devices' then showed:

T:  Bus=02 Lev=01 Prnt=01 Port=04 Cnt=01 Dev#=  3 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=12d1 ProdID=14ac Rev=00.00
S:  Manufacturer=Huawei Technologies
S:  Product=HUAWEI Mobile
C:  #Ifs= 7 Cfg#= 1 Atr=c0 MxPwr=500mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 1 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=ff Driver=qmi_wwan
I:  If#= 2 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=qmi_wwan
I:  If#= 3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
I:  If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
I:  If#= 6 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage

'mmcli -L' showed:
Found 1 modems:
        /org/freedesktop/ModemManager1/Modem/0 [QUALCOMM INCORPORATED] 8

mmcli -m 0 --simple-connect="apn=internet"
ifconfig wwan0 up
dhclient wwan0

'ifconfig wwan0' showed:
wwan0     Link encap:Ethernet  HWaddr 02:50:f3:00:00:00
          inet addr:197.107.110.16  Bcast:197.107.110.31  Mask:255.255.255.224
          inet6 addr: fe80::50:f3ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17 errors:0 dropped:0 overruns:0 frame:0
          TX packets:109 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1834 (1.8 KB)  TX bytes:17308 (17.3 KB)

And the connection was working!

> Thanks.  If it's only this address working, then the current workaround
> in qmi_wwan isn't enough.

I powered everything off and tested again.  When using cdc_ether and NDISDUP to make the connection, it only 
worked with the 0/1/2/3/4/5 MAC address.  When using qmi_wwan and mmcli to make the connection, it worked 
with the 02:50:f3:00:00:00 MAC address.

> Do you have a recent version of the qmi_wwan driver?  It's easy to find
> out with your device: If the wwan0 address is a random one, then the
> driver has applied the workaround.  It would be interesting to know if
> this works.  You can connect the same way you do with cdc_ether if you
> want to test it.

The MAC address wasn't random, it was always 02:50:f3:00:00:00.
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