MC7455 problem

[Aleksander Morgado]

On Wed, Jan 11, 2017 at 10:14 AM, Christophe Ronco
<c.ronco-externe at kerlink.fr> wrote:
> Good day every body
>
> I have some issues trying to connect internet with the Sierra MC7455 modem
>
> I used the qmi_wwan driver provided by linux kernel (3.10.0-514.2.2) on
> centos 7
> and cant connect using qmicli and qmi-network tools
> I saw in the documentation of this device that it support only raw ip mode
> i ask if the qmi_wwan provided by this kernel version support this mode or
> not
>
> To support raw-ip mode in qmi_wwan driver, you will need patches in this
> driver and in drivers/net/usb/usbnet.c done by Bjorn Mork.
> They are in vanilla kernel 4.5. I assume they are not in your kernel.
> The patches I have applied (on my 4.1 kernel):
> net: qmi_wwan: MDM9x30 specific power management
> net: qmi_wwan: support "raw IP" mode
> net: qmi_wwan: should hold RTNL while changing netdev type
> net: qmi_wwan: ignore bogus CDC Union descriptors
> usbnet: allow mini-drivers to consume L2 headers
>
> You will also need a quite recent libqmi package. I assume at least 1.14.0
> to have this patch (from Aleksander Morgado):
> qmi-network: if kernel allows updating LLP, prefer device-reported LLP

That is right.

Or, you can switch the modem to MBIM mode and try to use it with
mbimcli instead. I don't recall if there's any MBIM specific change
required for these to work, and cdc_mbim is already in that 3.10
kernel.

-- 
Aleksander
https://aleksander.es