From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>,
linux-pm@vger.kernel.org,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Ulf Hansson <ulf.hansson@linaro.org>,
Kevin Hilman <khilman@linaro.org>,
Russell King <rmk+kernel@arm.linux.org.uk>,
Krzysztof Kozlowski <k.kozlowski@samsung.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/2] PM / Runtime: Add pm_runtime_enable_recursive
Date: Wed, 20 May 2015 01:39:25 +0200 [thread overview]
Message-ID: <26522847.rzj8GpQKux@vostro.rjw.lan> (raw)
In-Reply-To: <Pine.LNX.4.44L0.1505191345480.1453-100000@iolanthe.rowland.org>
On Tuesday, May 19, 2015 01:49:15 PM Alan Stern wrote:
> On Tue, 19 May 2015, Tomeu Vizoso wrote:
>
> > This function makes less cumbersome to enable runtime PM in a device and
> > its descendants.
> >
> > Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
>
> I don't see the point of this. In the scenario you have in mind, are
> the device and all its descendants registered by the same
> subsystem/driver? If they are, can't the subsystem/driver code enable
> runtime PM for each of them when they are registered, by adding a
> single call in the right spot?
>
> If they don't all belong to the same subsystem/driver, who is going to
> call your pm_runtime_enable_recursive routine? No single caller will
> have the right to enable runtime PM for all these devices.
Agreed.
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
next prev parent reply other threads:[~2015-05-19 23:14 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-19 14:11 [PATCH v3 0/2] PM: direct_complete_default and pm_runtime_enable_recursive Tomeu Vizoso
2015-05-19 14:11 ` [PATCH v3 1/2] PM / sleep: Add power.direct_complete_default flag Tomeu Vizoso
2015-05-19 17:50 ` Alan Stern
2015-05-19 20:47 ` Ulf Hansson
2015-05-19 23:38 ` Rafael J. Wysocki
2015-05-19 14:11 ` [PATCH v3 2/2] PM / Runtime: Add pm_runtime_enable_recursive Tomeu Vizoso
2015-05-19 17:49 ` Alan Stern
2015-05-19 23:39 ` Rafael J. Wysocki [this message]
2015-05-20 9:03 ` Tomeu Vizoso
2015-05-20 14:24 ` Alan Stern
2015-07-02 13:59 ` Tomeu Vizoso
2015-07-02 15:21 ` Alan Stern
2015-07-03 8:11 ` Tomeu Vizoso
2015-07-03 14:16 ` Alan Stern
2015-07-03 14:22 ` Tomeu Vizoso
2015-07-03 15:11 ` Alan Stern
2015-07-04 0:32 ` Rafael J. Wysocki
2015-07-04 0:31 ` Rafael J. Wysocki
2015-07-04 14:37 ` Alan Stern
2015-07-05 23:36 ` Rafael J. Wysocki
2015-07-07 0:07 ` Rafael J. Wysocki
2015-07-07 14:55 ` Alan Stern
2015-07-07 22:06 ` Rafael J. Wysocki
2015-07-08 20:31 ` Alan Stern
2015-07-14 13:19 ` Tomeu Vizoso
2015-07-14 21:57 ` Alan Stern
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