This is a note to let you know that I've just added the patch titled
thermal: exynos: Disable the regulator on probe failure
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
thermal-exynos-disable-the-regulator-on-probe-failure.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 5f09a5cbd14ae16e93866040fa44d930ff885650 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Date: Mon, 8 Jun 2015 10:35:49 +0900
Subject: thermal: exynos: Disable the regulator on probe failure
From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
commit 5f09a5cbd14ae16e93866040fa44d930ff885650 upstream.
During probe the regulator (if present) was enabled but not disabled in
case of failure. So an unsuccessful probe lead to enabling the
regulator which was actually not needed because the device was not
enabled.
Additionally each deferred probe lead to increase of regulator enable
count so it would not be effectively disabled during removal of the
device.
Test HW: Exynos4412 - Trats2 board
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Fixes: 498d22f616f6 ("thermal: exynos: Support for TMU regulator defined at device tree")
Reviewed-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
Signed-off-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Tested-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx>
Signed-off-by: Eduardo Valentin <edubezval@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/thermal/samsung/exynos_tmu.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -1209,6 +1209,8 @@ err_clk_sec:
if (!IS_ERR(data->clk_sec))
clk_unprepare(data->clk_sec);
err_sensor:
+ if (!IS_ERR_OR_NULL(data->regulator))
+ regulator_disable(data->regulator);
thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);
return ret;
Patches currently in stable-queue which might be from k.kozlowski@xxxxxxxxxxx are
queue-4.1/thermal-exynos-disable-the-regulator-on-probe-failure.patch
queue-4.1/dmaengine-pl330-fix-overflow-when-reporting-residue-in-memcpy.patch
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