Re: [PATCH 1/3] PCI: Rework default handling of suspend and resume

From: Linus Torvalds
Date: Sat Dec 06 2008 - 12:34:17 EST

On Sat, 6 Dec 2008, Rafael J. Wysocki wrote:
> USB doesn't use that for PCI suspend-resume, it uses it for suspend-resume of
> USB devices behind the controller.

Oh, in that case there are no PCI users of this at all, and what the PCI
driver does is immaterial ;)

> But then we will save the device's registers in the "sleeping" state.

No no. The rule would be that a PCI driver - if it uses the new
infrastructure, which apparently nobody does _as_ a PCI driver - simply
would never do the whole "pci_set_power_state(PCI_D3hot)" etc crud AT ALL.

So a PCI driver would only do higher-level stuff in its suspend/resume
code. For example, a USB host controller would initiate the USB bus level
stuff, and likely just stop the controller (not suspend it - just stop

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at