Re: [PATCH 1/2] PM / Runtime: Add sysfs switch for disabling device run-time PM (rev. 2)

From: Rafael J. Wysocki
Date: Fri Jan 22 2010 - 17:55:44 EST

On Friday 22 January 2010, Alan Stern wrote:
> On Fri, 22 Jan 2010, Rafael J. Wysocki wrote:
> > > For example, we disable runtime PM for most USB devices by default.
> > > But a few drivers may know that their devices are able to handle it, so
> > > they want to change the default setting when they are bound.
> >
> > Runtime PM is disabled for all devices by default unless the driver enables
> > it. The setting in power/control is to override the driver's choice, so that
> > it can be disabled even if the driver tries to enable it.
> >
> > IOW, the user space is the owner of the power.runtime_auto flag and I don't
> > think we should allow drivers to modify it.
> Okay, I understand your point of view. It means I'll have to make some
> changes to the USB code. No problem.

Great, thanks a lot.

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