linux-kernel - Re: [RFC][PATCH 1/3] PM: Introduce new top level suspend and hibernation callbacks (rev. 4)

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Date:	Wed, 26 Mar 2008 23:09:54 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexey Starikovskiy <astarikovskiy@...e.de>,
	David Brownell <david-b@...bell.net>,
	Pavel Machek <pavel@....cz>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Oliver Neukum <oliver@...kum.org>
Subject: Re: [RFC][PATCH 1/3] PM: Introduce new top level suspend and
 hibernation callbacks (rev. 4)

On Thu, 27 Mar 2008, Rafael J. Wysocki wrote:

> @@ -68,22 +75,32 @@ int device_pm_add(struct device *dev)
>  		 dev->bus ? dev->bus->name : "No Bus",
>  		 kobject_name(&dev->kobj));
>  	mutex_lock(&dpm_list_mtx);
> -	if ((dev->parent && dev->parent->power.sleeping) || all_sleeping) {
> -		if (dev->parent->power.sleeping)
> -			dev_warn(dev,
> -				"parent %s is sleeping, will not add\n",
> +	if (dev->parent) {
> +		if (dev->parent->power.status >= DPM_SUSPENDING) {
> +			dev_warn(dev, "parent %s is sleeping, will not add\n",
>  				dev->parent->bus_id);

You forgot to check for dev->parent->power.status == DPM_INVALID.

Alan Stern

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