OpenWRT - MC7455 (MBIM) not working as expected.

[Bjørn Mork]

Aleksander Morgado <aleksander at aleksander.es> writes:
> On Wed, Jan 25, 2017 at 6:49 PM, Mark Wahlert <mark.wahlert at gmail.com> wrote:
>> Did you have an opportunity to check which kernel version you've had MBIM
>> working with successfully?
>
> I tested with 4.4.14. Maybe I was just lucky enough to be testing with
> a slow system and I didn't hit the bug fixed by Bjørn's patch?

Note that I never noticed this issue on my previous laptop (a 2008 model
Thinkpad X301), and it wasn't *that* slow :)

But I could just have been lucky because I had every possible debug
message enabled, and the "fix" is simply a very short additional delay
during probing.  You don't need to add much extra code there to achieve
the same effect.

The reason I brought it up, is that I saw another report of similar
failure on a Linksys WRT1900ACS recently. So I'm open for the thought
that newer wifi routers are powerful enough to make it a problem.  I
didn't initially believe so.

Anyway, I'm really curious to know if the patch solves the problem.
Because I'm still not certain that this is the case.


Bjørn