From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Oliver Neukum <oliver@neukum.org>
Cc: Alan Stern <stern@rowland.harvard.edu>,
"Rafael J. Wysocki" <rjw@sisk.pl>,
linux-acpi@vger.kernel.org, USB list <linux-usb@vger.kernel.org>
Subject: Re: [PATCH] usb: Add support for runtime power management of the hcd
Date: Thu, 12 Nov 2009 16:59:58 +0000 [thread overview]
Message-ID: <20091112165958.GA9389@srcf.ucam.org> (raw)
In-Reply-To: <200911121800.02383.oliver@neukum.org>
On Thu, Nov 12, 2009 at 06:00:02PM +0100, Oliver Neukum wrote:
> Exactly, but that isn't the same as needing two attributes exported to user
> space. That is an absolute requirement only if we can't tell what a device's
> capabilities are.
Right. I don't see any reason for runtime wakeup to be exposed to
userspace - it's an entirely orthogonal concept to system wakeup. The
relevant userspace policy is whether or not runtime pm is enabled.
> We could introduce a second attribute if we want to prevent drivers from
> using remote wakeup to do runtime power management, but it is not
> required. We could simply not give user space that choice.
Absolutely.
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2009-11-12 17:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-09 22:43 [PATCH] usb: Add support for runtime power management of the hcd Matthew Garrett
2009-11-10 8:20 ` Oliver Neukum
[not found] ` <200911100920.03361.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-11-10 12:41 ` Matthew Garrett
[not found] ` <20091110124109.GA18631-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-10 13:08 ` Oliver Neukum
[not found] ` <200911101408.01867.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-11-10 14:12 ` Matthew Garrett
[not found] ` <20091110141259.GA19792-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-10 15:04 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0911100949500.2888-100000-IYeN2dnnYyZXsRXLowluHWD2FQJk+8+b@public.gmane.org>
2009-11-11 11:34 ` Oliver Neukum
[not found] ` <200911111234.43867.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-11-11 17:08 ` Alan Stern
2009-11-11 17:27 ` Oliver Neukum
2009-11-11 19:06 ` Alan Stern
[not found] ` <Pine.LNX.4.44L0.0911111400370.6882-100000-pYrvlCTfrz9XsRXLowluHWD2FQJk+8+b@public.gmane.org>
2009-11-11 22:24 ` Rafael J. Wysocki
2009-11-11 23:09 ` Alan Stern
2009-11-12 0:33 ` Matthew Garrett
2009-11-12 7:41 ` Oliver Neukum
2009-11-12 14:51 ` Matthew Garrett
2009-11-12 16:50 ` Alan Stern
[not found] ` <20091112145121.GB6709-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-12 17:00 ` Oliver Neukum
2009-11-12 16:59 ` Matthew Garrett [this message]
[not found] ` <20091112165958.GA9389-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-16 21:26 ` Oliver Neukum
2009-11-16 22:26 ` Rafael J. Wysocki
[not found] ` <20091112003312.GA27572-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2009-11-12 16:22 ` Alan Stern
2009-11-12 14:44 ` Oliver Neukum
[not found] ` <200911121544.19313.oliver-GvhC2dPhHPQdnm+yROfE0A@public.gmane.org>
2009-11-12 16:47 ` Alan Stern
2009-11-12 10:31 ` Oliver Neukum
2009-11-12 14:50 ` Matthew Garrett
2009-11-11 22:15 ` Rafael J. Wysocki
2009-11-11 23:05 ` Alan Stern
2009-11-11 21:36 ` Rafael J. Wysocki
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