Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/…

…rzhang/linux

Pull thermal fixes from Zhang Rui:

 - fix NULL pointer dereference on module load/probe for int3403_thermal
   driver

 - fix an emergency shutdown issue on exynos thermal driver

* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
  thermal: exynos: Propagate error value from tmu_read()
  thermal: exynos: Reading temperature makes sense only when TMU is turned on
  thermal: int3403_thermal: Fix NULL pointer deref on module load / probe

drivers/thermal/int340x_thermal/int3403_thermal.c

@@ -194,15 +194,14 @@ static int int3403_cdev_add(struct int3403_priv *priv)
 		return -EFAULT;
 	}
 
+	priv->priv = obj;
 	obj->max_state = p->package.count - 1;
 	obj->cdev =
 		thermal_cooling_device_register(acpi_device_bid(priv->adev),
 				priv, &int3403_cooling_ops);
 	if (IS_ERR(obj->cdev))
 		result = PTR_ERR(obj->cdev);
 
-	priv->priv = obj;
-
 	kfree(buf.pointer);
 	/* TODO: add ACPI notification support */
 

drivers/thermal/samsung/exynos_tmu.c

@@ -185,6 +185,7 @@
  * @regulator: pointer to the TMU regulator structure.
  * @reg_conf: pointer to structure to register with core thermal.
  * @ntrip: number of supported trip points.
+ * @enabled: current status of TMU device
  * @tmu_initialize: SoC specific TMU initialization method
  * @tmu_control: SoC specific TMU control method
  * @tmu_read: SoC specific TMU temperature read method
@@ -205,6 +206,7 @@ struct exynos_tmu_data {
 	struct regulator *regulator;
 	struct thermal_zone_device *tzd;
 	unsigned int ntrip;
+	bool enabled;
 
 	int (*tmu_initialize)(struct platform_device *pdev);
 	void (*tmu_control)(struct platform_device *pdev, bool on);
@@ -398,6 +400,7 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
 	mutex_lock(&data->lock);
 	clk_enable(data->clk);
 	data->tmu_control(pdev, on);
+	data->enabled = on;
 	clk_disable(data->clk);
 	mutex_unlock(&data->lock);
 }
@@ -889,19 +892,24 @@ static void exynos7_tmu_control(struct platform_device *pdev, bool on)
 static int exynos_get_temp(void *p, int *temp)
 {
 	struct exynos_tmu_data *data = p;
+	int value, ret = 0;
 
-	if (!data || !data->tmu_read)
+	if (!data || !data->tmu_read || !data->enabled)
 		return -EINVAL;
 
 	mutex_lock(&data->lock);
 	clk_enable(data->clk);
 
-	*temp = code_to_temp(data, data->tmu_read(data)) * MCELSIUS;
+	value = data->tmu_read(data);
+	if (value < 0)
+		ret = value;
+	else
+		*temp = code_to_temp(data, value) * MCELSIUS;
 
 	clk_disable(data->clk);
 	mutex_unlock(&data->lock);
 
-	return 0;
+	return ret;
 }
 
 #ifdef CONFIG_THERMAL_EMULATION