linux-kernel - [PATCH 1/6] thermal: exynos: fix: Return from exynos_report_trigger() when therm

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Date:	Tue, 24 Sep 2013 10:08:17 +0200
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <eduardo.valentin@...com>,
	Amit Daniel Kachhap <amit.daniel@...sung.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	Lukasz Majewski <l.majewski@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Myungjoo Ham <myungjoo.ham@...sung.com>,
	devicetree@...r.kernel.org, linux-samsung-soc@...r.kernel.org
Subject: [PATCH 1/6] thermal: exynos: fix: Return from exynos_report_trigger()
 when therm_dev is NULL

The commit 4de0bdaa9677d11406c9becb70c60887c957e1f0
("thermal: exynos: Add support for instance based register/unregister")
broke check for presence of therm_dev at global thermal zone in
exynos_report_trigger().

The resulting wrong test prevents thermal_zone_device_update() call, which
calls handlers for situation when trip points are passed.
Such behavior prevents thermal driver from proper reaction (when TMU interrupt
is raised) in a situation when overheating is detected at TMU hardware.
This patch fixes it.

Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Reviewed-by: Tomasz Figa <t.figa@...sung.com>
---
 drivers/thermal/samsung/exynos_thermal_common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thermal/samsung/exynos_thermal_common.c b/drivers/thermal/samsung/exynos_thermal_common.c
index f10a6ad..55a912a 100644
--- a/drivers/thermal/samsung/exynos_thermal_common.c
+++ b/drivers/thermal/samsung/exynos_thermal_common.c
@@ -310,7 +310,7 @@ void exynos_report_trigger(struct thermal_sensor_conf *conf)
 	}
 
 	th_zone = conf->pzone_data;
-	if (th_zone->therm_dev)
+	if (!th_zone->therm_dev)
 		return;
 
 	if (th_zone->bind == false) {
-- 
1.7.10.4

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