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thermal: Exynos: Fix NULL pointer dereference in exynos_unregister_thermal()

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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>
This commit is contained in:
Sachin Kamat 2012-09-27 16:20:38 +05:30 committed by Zhang Rui
parent a4b6fec977
commit c072fed95c
1 changed files with 5 additions and 2 deletions
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7
drivers/thermal/exynos_thermal.c
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@ -475,11 +475,14 @@ static void exynos_unregister_thermal(void)
{
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]);
}