Querying WWAN iface name for each /dev/cdc-wdm device

[Bjørn Mork]

On 28 January 2015 13:09:02 CET, Aleksander Morgado <aleksander at aleksander.es> wrote:
>On Tue, Jan 27, 2015 at 5:19 PM, Aleksander Morgado
><aleksander at aleksander.es> wrote:
>> On Tue, Jan 27, 2015 at 4:08 PM, Bjørn Mork <bjorn at mork.no> wrote:
>>>> In order to handle the case of the renames, I guess libqmi
>shouldn't
>>>> cache the net iface name the first time it's read, right? I mean if
>>>> someone calls qmi_device_get_wwan_iface() we better get the
>filename
>>>> directly from sysfs every time?
>>>
>>> Yup, that's necessary if you care about the name. Note that this is
>racy
>>> in any case, so you do risk that the name refers to something else
>by
>>> the time you present it to the user. But I don't know if we should
>>> care.  I cannot imagine a real rename use case after device
>discovery is
>>> completed.
>>
>> Agreed; will go on with those changes then.
>>
>>
>
>How about now?
>
>http://cgit.freedesktop.org/libqmi/commit/?h=aleksander/wwan-iface-2&id=db41fa4d6da83dfe108a72c35120187c7bb516b2
>
>The logic should first look at "usbmisc", and if not found, fallback
>to "usb"; that's correct, right?

Yes, the class name was "usb" in older kernels. Don't remember when this was changed, but I guess it doesn't matter. We must handle both forever...


Bjørn