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Date: Fri, 22 Jan 2010 17:45:51 -0500 (EST) From: Alan Stern <stern@...land.harvard.edu> To: "Rafael J. Wysocki" <rjw@...k.pl> cc: pm list <linux-pm@...ts.linux-foundation.org>, LKML <linux-kernel@...r.kernel.org>, Jesse Barnes <jbarnes@...tuousgeek.org>, Matthew Garrett <mjg59@...f.ucam.org>, Greg KH <greg@...ah.com> Subject: Re: [PATCH 1/2] PM / Runtime: Add sysfs switch for disabling device run-time PM (rev. 2) 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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