On Sat, 19 Feb 2005, David Brownell wrote:

> Re timer polling -- yes, that's a mess, and I seem to recall you were
> looking at a way to let HCDs (like OHCI and EHCI) say they don't need
> a root hub timer.  (Hmm, maybe just add a hc_driver.flags bit to say if
> the HCD wants the timer, and some way for HCDs with IRQ-driven root hubs
> to tell khubd to check their root hub.   It might be more efficient to
> have me take a whack at that first, letting you focus on any issues
> that turns up with UHCI.)

After some light testing, that patch I sent in

http://marc.theaimsgroup.com/?l=linux-usb-devel&m=110887043927780&w=2

looks okay.  Do you want to take it from here and integrate it with the
HCDs?

Also, would you like me to put together a way for HCDs to request their 
root hub be resumed, plus get usb_hc_died into better shape?

Alan Stern



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