Hi,

Dan Williams:
> > ttyUSB0 acts like a modem. That it opens instantly holds with picocom
> > as well, the other ones hang for a bit.

I suspect that the best workaround for this would be, upon the first time a
port is opened,

* set the timeout for the setup URB to 0.5sec or so.
* remember that it timed out and don't attempt to do it again.
* don't block the open until there's a response

Given that Huawei likes to recycle their USB product IDs, I don't see much
chance to proactively prevent this from happening entirely.

-- 
-- Matthias Urlichs

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