linux-kernel - Re: [PATCH V2 0/4] introduce device async actions mechanism

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Message-ID: <Pine.LNX.4.44L0.0908121633220.23954-100000@iolanthe.rowland.org>
Date:	Wed, 12 Aug 2009 16:34:37 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Zhang Rui <rui.zhang@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	linux-acpi <linux-acpi@...r.kernel.org>,
	Pavel Machek <pavel@....cz>, Len Brown <lenb@...nel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	"dtor@...l.ru" <dtor@...l.ru>
Subject: Re: [PATCH V2 0/4] introduce device async actions mechanism

On Wed, 12 Aug 2009, Rafael J. Wysocki wrote:

> > The one thing I'm not sure of is the pm_runtime_put_noidle calls in 
> > driver_probe_device and __device_release_driver.  It seems that we 
> > should always call pm_runtime_put regardless of whether the probe 
> > succeeds or not.
> 
> Did you mean pm_runtime_put_sync()?

Yes.  I haven't used the new code yet so the names don't stick in my 
mind.

> > For example, the USB stack is set up to suspend devices that don't have
> > a driver (this is handled at the bus subsystem level).  But if probing
> > failed, there wouldn't be any idle callback and so the suspend wouldn't
> > take place.
> 
> OK, I'll make this change.

Thanks.  Now I just have to figure out the best way to convert USB over 
to the new framework...

Alan Stern

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