linux-kernel - [Resend 2x] thermal: Prevent polling from happening during system suspend

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Message-Id: <201111061421.38580.rjw@sisk.pl>
Date:	Sun, 6 Nov 2011 14:21:38 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Len Brown <lenb@...nel.org>
Cc:	"Len Brown (Intel)" <len.brown@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>,
	Linux PM list <linux-pm@...r.kernel.org>
Subject: [Resend 2x] thermal: Prevent polling from happening during system suspend

From: Rafael J. Wysocki <rjw@...k.pl>

The thermal driver should use a freezable workqueue to schedule
polling to prevent thermal_zone_device_update() from being run
during system suspend, when the devices it relies on may be inactive.
Make it use the system freezable workqueue for this purpose.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/thermal/thermal_sys.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux/drivers/thermal/thermal_sys.c
===================================================================
--- linux.orig/drivers/thermal/thermal_sys.c
+++ linux/drivers/thermal/thermal_sys.c
@@ -678,10 +678,10 @@ static void thermal_zone_device_set_poll
 		return;
 
 	if (delay > 1000)
-		schedule_delayed_work(&(tz->poll_queue),
+		queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
 				      round_jiffies(msecs_to_jiffies(delay)));
 	else
-		schedule_delayed_work(&(tz->poll_queue),
+		queue_delayed_work(system_freezable_wq, &(tz->poll_queue),
 				      msecs_to_jiffies(delay));
 }
 
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