[PATCH] thermal/drivers/exynos: Fix NULL pointer dereference when getting the critical temp

[Daniel Lezcano]

The driver is assuming the get_critical temperature exists as it is
inherited by the thermal of ops. But this one has been removed in
favor of the generic one.

Use the generic thermal_zone_get_crit_temp() function instead

Fixes: 13bea86623b ("thermal/of: Remove of_thermal_get_crit_temp(")
Reported-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
 drivers/thermal/samsung/exynos_tmu.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 5a1ffe2f3134..37465af59262 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -264,9 +264,8 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
 	unsigned int status;
 	int ret = 0, temp;
 
-	if (data->soc != SOC_ARCH_EXYNOS5433) /* FIXME */
-		ret = tzd->ops->get_crit_temp(tzd, &temp);
-	if (ret) {
+	ret = thermal_zone_get_crit_temp(tzd, &temp);
+	if (ret && data->soc != SOC_ARCH_EXYNOS5433) { /* FIXME */
 		dev_err(&pdev->dev,
 			"No CRITICAL trip point defined in device tree!\n");
 		goto out;
-- 
2.34.1