Re: Linux 2.6.14 ehci-hcd hangs machine

[David Brownell <david-b@pacbell.net>]

On Monday 31 October 2005 2:15 pm, Borislav Petkov wrote:
> > >and dies. This bug is actually in there since 2.6.14-rc4 (see:
> > >http://bugzilla.kernel.org/show_bug.cgi?id=5428) and David Brownell
> > >supplied a patch which turned out to be useless eventually 
> > >since _rebooting_ 
> > >the kernel with the 'usb-handoff' (and without the patch) 
> > >solved the problem. 

In current GIT kernels (2.6.14+) that patch is now merged, and
also usb-handoff is the default.


> > >As it turns out, it actually solves the problem only for the 
> > >reboot case.
> > >My machine still hangs on an initial boot with and without 
> > >'usb-handoff'.

Huh?  That's not what you'd reported before.  What changed?
You're saying that _with_ that patch, and usb-handoff, it fails?


> >   While running with 'usb-handoff' turned on, do you see something like
> > "EHCI early BIOS handoff failed" (in power on or reboot cases) ? 
>
> Nope,	nothing of the like in the serial console log.

If the problem was IRQs getting somehow enabled after the handoff,
that patch would probably be a very useful thing.  If that does
help, I'll suggest that be merged into 2.6.14.x ... it'd have been
good to merge for 2.6.14.0 but quick merges seem mostly to be a
thing of the past any more.

- Dave