On Wednesday 27 April 2005 8:09 am, Alan Stern wrote:
> On Wed, 27 Apr 2005, David Brownell wrote:
> 
> > Calling remove() and probe() ought to work just fine, and after all
> > those methods will always be well debugged.  There was just a little
> > bitty self-deadlock problem in the PM core to fix ...
> 
> Has that been fixed yet?  Didn't Paulus submit something addressing this 
> deadlock?

Something.  That's why I said "ought" and "was".  I've not made
time to test that; it's the sort of interaction that tends to
break with all the stuff that's been changing in pmcore and in
the driver core.  (Worth converting ASAP if it does indeed work.)


> > > Everything necessary should already be present in Greg's
> > > usb-2.6.12-rc3.patch.  But I suspect you don't really need anything
> > > special.  If a root-hub timer fires at a bad moment, the hub_status
> > > routine need only return 0.
> > 
> > That patch is too new for me to be working with, unfortunately; and
> > my time for converting to GIT is not yet.
> 
> I'm not using git either.  I just get Greg's cumulative patch files, apply 
> them to a copy of the vanilla source tree, and use quilt.  It's a little 
> awkward, but it's hard to imagine it being any worse than git at this 
> stage.

It's just that I have limited cycles to track the latest 2.6 code,
particularly when I have so much stuff in BK.


> > Note that both EHCI and OHCI already _have_ such logic in the hub_status
> > code ... but it wasn't sufficient before.  There are a LOT of paths through
> > usbcore and HCDs on which things will trip up.
> 
> Guess I'm used to UHCI, where things are simpler.

I'm not sure it's a case of things being simpler.  I was testing a
few dozen different configurations, and not all of them had those
wierd cases.  There's nothing fundamentally different about UHCI;
it could have those same configurations.

- Dave



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