Hi Rafael. Just a couple of typos in the comment: On Sun, 2009-02-01 at 22:33 +0100, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@xxxxxxx> > > Currently, the PM core always attempts to manage devices with drivers > that use the new PM framework. In particular, it attempts to disable > the devices (which is unnecessary), to save their state (which may be > undesirable if the driver has done that already) and to put them into > low power states (again, this may be undesirable if the driver has > already put the device into a low power state). That need not be > the right thing to do, so make the core be more careful in this > respect. > > Generally, there are the following categories of devices to consider: > * bridge devices without drivers > * non-bridge devices without drivers > * bridge devices with drivers > * non-bridge devices with drivers > and each of them should be handled differently. > > For bridge devices without drivers the PCI PM core will save their > state on suspend and restore it (early) during resume, after putting > them into D0 if necessary. It will not attepmt to do anything else s/attepmt/attempt/ > to these devices. > > For non-bridge devices without drivers the PCI PM core will disable > them and save their state on suspend. During resume, it will put > them into D0, if necessary, restore their state (early) and reenable > them. > > For bridge devices without drivers the PCI PM core will only save s/without/with/ > their state on suspend if the driver hasn't done that already. > Still, the core will restore their state (early) during resume, > after putting them into D0, if necessary. > > For non-bridge devices with drivers the PCI PM core will only save > their state on suspend if the driver hasn't done that already. Also, > if the state of the device hasn't been saved by the driver, the core > will attempt to put the device into a low power state. During > resume the core will restore the state of the device (early), after > putting it into D0, if necessary. > > For all devices the core will disable wake-up during resume. > > Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx> I'm not pretending to understand the gory details of the code itself, and so don't want you to add a Reviewed-by or such like for me, thanks. Regards, Nigel -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
