MC 7455 enumeration

[Peter Fassberg]

Hi all,

On Tue, 30 Jul 2019, Bjørn Mork wrote:
> On July 30, 2019 5:15:24 PM GMT+02:00, Dan Williams <dcbw at redhat.com> wrote:
>> On Mon, 2019-07-29 at 18:38 +0000, Peter Fässberg wrote:
>>> Hi,
>>>
>>> I have now managed to get my MC 7455 to work very well, but I have
>>> some errors logged:
>>>
>>> usb 1-1.3: config 1 has an invalid interface number: 8 but max is 4
>>> usb 1-1.3: config 1 has an invalid interface number: 10 but max is 4
>>> usb 1-1.3: config 1 has no interface number 1
>>> usb 1-1.3: config 1 has no interface number 4
>>> usb 1-1.3: New USB device found, idVendor=1199, idProduct=9071,
>>> bcdDevice= 0.06
>>> usb 1-1.3: Product: Sierra Wireless MC7455 Qualcomm® Snapdragon(tm)
>>> X7 LTE-A
>>> qcserial 1-1.3:1.0: Qualcomm USB modem converter detected
>>> qcserial 1-1.3:1.2: Qualcomm USB modem converter detected
>>> qcserial 1-1.3:1.3: Qualcomm USB modem converter detected
>>> qmi_wwan 1-1.3:1.8: cdc-wdm0: USB WDM device
>>> qmi_wwan 1-1.3:1.10: cdc-wdm1: USB WDM device
>>>
>>> It complains over interface number 8 and 10, but it still use them.
>>>
>>> Do you have any idea about how to get rid of this?
>>
>> What do you get for:
>>
>> lsusb -v -d 1199:9071
>
> The warnings are expected and can safely be ignored. Getting rid of them has been suggested.
>
> See https://linux-usb.vger.kernel.narkive.com/pXEUsj2F/config-x-has-an-invalid-interface-number-y-but-max-is-z

Thank you Dan and Bjørn!

Thank you for pointing this out.

So the real solution is to nudge Sierra and/or QC. :)



// Peter