Re: kernel 2.6 : cdc_acm problem

[David Brownell]

> > The problem is that cdc_acm calls a "softirq-only" routine
> > in a hardirq context.  See this patch:
> >
> > http://marc.theaimsgroup.com/?l=linux-usb-devel&m=106764585001038&w=2
> >
> > It's not clear that'll make it into 2.6.0-final.
>
>
> I've not planned to submit it for 2.6.0 as it's a relativly big change,
> and I don't have the hardware to test it out.  Anyone have any other
> thoughts about this?

Doesn't seem big to me.  It could be shrunk a smidgeon, but
that's the version that's gotten the positive test results.

The folk who have this kind of hardware have reported this
happening for quite a few months now, and it does seem to
fill up log buffers with catastrophic-seeming stack traces.

Colin, does it fix your problem?  Can you eke more than
twenty minutes from your laptop battery now?  :)

- Dave

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