Re: [linux-pm] [Ipw2100-devel] [RFC] Runtime power management on ipw2100

David Brownell
2007-02-19T21:08:49Z

On Thursday 08 February 2007 1:01 am, Zhu Yi wrote:

> A generic requirement for dynamic power management is the hardware
> resource should not be touched when you put it in a low power state.

That is in no way a "generic" requirement. It might apply specifically
to one ipw2100 low power state ... but "in general" devices may support
more than one low power state, with different levels of functionality.
Not all of those levels necessarily disallow touching the hardware.

> But I think
> freeing the irq handler before suspend should be the right way to go.

Some folk like that model a lot for shared IRQs. It shouldn't
matter for non-sharable ones.

- Dave