Cannot send message: QMI service 'pdc' version '1.15' required, got version '1.0'

[Aleksander Morgado]

Hey!


> I’m testing mm 1.12.2 + libqmi 1.24.2 on sierra EM7565 (openwrt). Please see last line of log. Is this ok?
>
>
>
> I do not see this in mm 1.12.0 + libqmi 1.24.0
>
>
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Enabling QMI indications via MBIM...
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] enabled QMI indications via MBIM
>
> Dec 13 15:51:38 OpenWrt [5904]: <info>  [cdc-wdm0] MBIM device is QMI capable
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Allocating new client ID...
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Registered 'dms' (version 1.0) client with ID '1'
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Allocating new client ID...
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Registered 'nas' (version 1.25) client with ID '2'
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Allocating new client ID...
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Registered 'loc' (version 2.0) client with ID '1'
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Allocating new client ID...
>
> Dec 13 15:51:38 OpenWrt [5904]: [/dev/cdc-wdm0] Registered 'pdc' (version 1.0) client with ID '1'
>
> Dec 13 15:51:39 OpenWrt [5904]: <info>  QMI-based capability and mode switching support enabled
>
> Dec 13 15:51:39 OpenWrt [5904]: <warn>  couldn't load carrier config: 'Cannot send message: QMI service 'pdc' version '1.15' required, got version '1.0''
>

I believe the issue is unrelated to the MM/libqmi version. It would be
very strange that the modem replies differnet things when using
different libqmi versions really.

The problem, though, is something we should fix. The version checks
done by libqmi are truly broken, because they rely on the version info
for each message that is defined in our message database, and that
information is far from good or up to date. If the message is not
supported by the device, we'll get an error when trying to use it.
Trying to return an early error before sending the request assuming
our information of when it was introduced is good is not the way to
go.

-- 
Aleksander
https://aleksander.es