Re: [RFC] Runtime power management on ipw2100

Pavel Machek
2007-01-31T13:04:47Z

On Wed 2007-01-31 13:53:20, Amit Kucheria wrote:
> On Wed, 2007-01-31 at 11:48 +0100, ext Andi Kleen wrote:
> > On Wednesday 31 January 2007 11:27, Matthew Garrett wrote:
> > > On Wed, Jan 31, 2007 at 12:13:04PM +0100, Andi Kleen wrote:
> > > > Matthew Garrett <mjg59@srcf.ucam.org> writes:
> > > > >
> > > > > PCI seems to require a delay of 10ms when sequencing from D3 to D0,
> > > > > which probably isn't acceptable latency for an "up" state.
> > > >
> > > > It might be if the interface has been idle for some time
> > > > (and the delay is not busy looping of course)
> > >
> > > Hm. How would this interact with receiving packets?
> >
> > The hardware will hopefully have support to wake itself up when that
> > happens.
>
> Yes. Low power states without ability to respond to wakeup interrupts
> would be broken behaviour generally.

Do you realy expect wifi to save significant ammount of power, while
still listening for packets on wireless network?
Pavel
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