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

From: Alan Stern
Date: Fri Jan 22 2010 - 17:46:07 EST

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.

Alan Stern

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