thermal: Exynos: Fix NULL pointer dereference in exynos_unregister_thermal()
exynos_unregister_thermal() is functional only when 'th_zone' is not
NULL (ensured by the NULL checks). However, in the event it is NULL, it
gets dereferenced in the for loop. This patch fixes this issue.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
diff --git a/drivers/thermal/exynos_thermal.c b/drivers/thermal/exynos_thermal.c
index e84acde..fd03e85 100644
--- a/drivers/thermal/exynos_thermal.c
+++ b/drivers/thermal/exynos_thermal.c
@@ -475,11 +475,14 @@
{
int i;
- if (th_zone && th_zone->therm_dev)
+ if (!th_zone)
+ return;
+
+ if (th_zone->therm_dev)
thermal_zone_device_unregister(th_zone->therm_dev);
for (i = 0; i < th_zone->cool_dev_size; i++) {
- if (th_zone && th_zone->cool_dev[i])
+ if (th_zone->cool_dev[i])
cpufreq_cooling_unregister(th_zone->cool_dev[i]);
}