linux-kernel - __pm_runtime_idle() returns -11!

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Message-ID: <20090930074650.GA2300@box.home>
Date:	Wed, 30 Sep 2009 20:46:50 +1300
From:	Kelly Bowa <kbpm@...edu.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Magnus Damm <magnus.damm@...il.com>, Greg KH <gregkh@...e.de>,
	Pavel Machek <pavel@....cz>, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: __pm_runtime_idle() returns -11!

Hi Rafael,

I get the following error messages in dmesg:

[    0.488758] ACPI: Enumerating devices from [\]
[    0.489673] PM: Adding info for acpi:LNXSYSTM:00
[    0.489856] acpi LNXSYSTM:00: __pm_runtime_idle()!
[    0.489862] acpi LNXSYSTM:00: __pm_runtime_idle() returns -11!
[    0.490952] PM: Adding info for acpi:LNXCPU:00
[    0.491154] acpi LNXCPU:00: __pm_runtime_idle()!
[    0.491161] acpi LNXCPU:00: __pm_runtime_idle() returns -11!
....

full dmesg: www.tuxedu.org/kbpm/dmesg2.txt

__pm_runtime_idle() returns -11 which could be that it is waiting for other 
suspend running in parallel or that pm_runtime_cancel() fails to suspend the 
given device ?.. this causes a noticeable delay in boot time. I get this on 
2.6.31-mm1 and ill soon test against 2.6.32-rc1..

-- 
kbpm
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