linux-kernel - Re: arm qemu boot failures in -next due to 'PM / Domains: add setter for dev.pm

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Date:	Mon, 11 Jan 2016 12:04:50 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Russell King <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: arm qemu boot failures in -next due to 'PM / Domains: add setter
 for dev.pm_domain'

On Mon, Jan 11, 2016 at 10:55:00AM -0800, Tony Lindgren wrote:
> * Guenter Roeck <linux@...ck-us.net> [160111 09:51]:
> > Hi,
> > 
> > I see 6 out of 24 arm qemu tests failing in next-20160111. Bisect points
> > to commit 989561de9b51 ("PM / Domains: add setter for dev.pm_domain").
> > Failures are silent - there is no output on the console.
> > Affected tests are
> > 
> > arm:beagle:multi_v7_defconfig:omap3-beagle
> > arm:beaglexm:multi_v7_defconfig:omap3-beagle-xm
> > arm:overo:multi_v7_defconfig:omap3-overo-tobi
> > arm:beagle:omap2plus_defconfig:omap3-beagle
> > arm:beaglexm:omap2plus_defconfig:omap3-beagle-xm
> > arm:overo:omap2plus_defconfig:omap3-overo-tobi
> > 
> > For details please see the 'next' column at http://server.roeck-us.net:8010/builders.
> > 
> > Reverting the offending commit fixes the problems.
> > 
> > Please let me know if there is anything I can do to help tracking down the problem.
> 
> The following fixes the booting, but I wonder if it's a

Yes, it does. 

Tested-by: Guenter Roeck <linux@...ck-us.net>

> proper fix?
> 
That I don't know.

Guenter

> --- a/drivers/base/power/common.c
> +++ b/drivers/base/power/common.c
> @@ -145,9 +145,10 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd)
>  {
>  	if (dev->pm_domain == pd)
>  		return;
> -
> -	WARN(device_is_bound(dev),
> -	     "PM domains can only be changed for unbound devices\n");
> +	if (device_is_registered(dev)) {
> +		WARN(device_is_bound(dev),
> +		     "PM domains can only be changed for unbound devices\n");
> +	}
>  	dev->pm_domain = pd;
>  	device_pm_check_callbacks(dev);
>  }