On Tue, 12 Jun 2007 13:40:15 +0900 Tejun Heo <htejun@xxxxxxxxx> wrote: > I don't think the end result will vary in any significant way. My > biggest argument for sw implementation is it can be used for other > controllers. What I had in mind when I created the new port operation "enable_pm" was that other controllers (besides the ahci controller) could define their own method of enabling power management. Maybe for non-ahci controllers this is a software based solution which uses generic SATA dipm/hipm stuff and polling. See patch 2/3 of this series for the implementation of this. Kristen - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html