[PATCH 4.1 77/84] thermal: exynos: Disable the regulator on probe failure

From: Greg Kroah-Hartman
Date: Fri Aug 14 2015 - 13:49:50 EST

4.1-stable review patch. If anyone has any objections, please let me know.


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

Additionally each deferred probe lead to increase of regulator enable
count so it would not be effectively disabled during removal of the

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))
+ if (!IS_ERR_OR_NULL(data->regulator))
+ regulator_disable(data->regulator);
thermal_zone_of_sensor_unregister(&pdev->dev, data->tzd);

return ret;

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