Re: [PATCH] USB: improve ehci_watchdog's side effect in CPU powermanagement

[Alan Stern]

On Fri, 21 Nov 2008, Yi Yang wrote:

> But on Asus EeePC, i saw another periodical timer usb_hcd_poll_rh_status
> which fires every 256 milisecond, is this also doing with some
> hardware's quirk?

That timer is associated mostly with UHCI controllers.  It is not 
because of a hardware quirk.  If the controller is suspended (for 
example, because no devices are attached to it) then the timer should 
stop.

Alan Stern

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