linux-kernel - Re: [PATCH 2/4] PM: Run the driver callback directly if the subsystem one is not there

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Message-ID: <Pine.LNX.4.44L0.1112100958350.594-100000@netrider.rowland.org>
Date:	Sat, 10 Dec 2011 09:59:12 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH 2/4] PM: Run the driver callback directly if the subsystem
 one is not there

On Sat, 10 Dec 2011, Rafael J. Wysocki wrote:

> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Make the PM core execute driver PM callbacks directly if the
> corresponding subsystem callbacks are not present.
> --- linux.orig/drivers/base/power/runtime.c
> +++ linux/drivers/base/power/runtime.c
> @@ -250,6 +250,9 @@ static int rpm_idle(struct device *dev,
>  	else
>  		callback = NULL;
>  
> +	if (!callback && dev->driver && dev->driver->pm)
> +		callback = dev->driver->pm->runtime_idle;
> +
>  	if (callback)
>  		__rpm_callback(callback, dev);
>  
> @@ -713,6 +716,12 @@ static int rpm_resume(struct device *dev
>  	else
>  		callback = NULL;
>  
> +	if (!callback && dev->driver && dev->driver->pm)
> +		callback = dev->driver->pm->runtime_suspend;
> +
> +	if (!callback && dev->driver && dev->driver->pm)
> +		callback = dev->driver->pm->runtime_resume;
> +
>  	retval = rpm_callback(callback, dev);
>  	if (retval) {
>  		__update_runtime_status(dev, RPM_SUSPENDED);

Looks like part of that got added in the wrong place.

Alan Stern

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