Re: [GIT PULL] PM updates for 2.6.33

Linus Torvalds
2009-12-07T21:41:57Z

On Mon, 7 Dec 2009, Alan Stern wrote:
>
> It only seems that way because you didn't take into account devices
> that suspend synchronously but whose children suspend asynchronously.

But why would I care? If somebody suspends synchronously, then that's what
he wants.

> A synchronous suspend routine for a device with async child suspends
> would have to look just like your usb_node_suspend():

Sure. But that sounds like a "Doctor, it hurts when I do this" situation.
Don't do that.

Make the USB host controller do its suspend asynchronously. We don't
suspend PCI bridges anyway, iirc (but I didn't actually check). And at
worst, we can make the PCI _bridges_ know about async suspends, and solve
it that way - without actually making any normal PCI drivers do it.

Linus