[RFC,2/8] thermal: Properly handle mode values in .set_mode()

Message ID 20200407174926.23971-3-andrzej.p@collabora.com
State New
Headers show
Series
  • Stop monitoring disabled devices
Related show

Commit Message

Andrzej Pietrasiewicz April 7, 2020, 5:49 p.m.
Allow only THERMAL_DEVICE_ENABLED and THERMAL_DEVICE_DISABLED as valid
states to transition to.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
---
 drivers/net/ethernet/mellanox/mlxsw/core_thermal.c | 8 ++++++--
 drivers/platform/x86/acerhdf.c                     | 4 ++++
 drivers/thermal/imx_thermal.c                      | 4 +++-
 drivers/thermal/intel/intel_quark_dts_thermal.c    | 5 ++++-
 drivers/thermal/of-thermal.c                       | 4 +++-
 5 files changed, 20 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
index ce0a6837daa3..cd435ca7adbe 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_thermal.c
@@ -296,8 +296,10 @@  static int mlxsw_thermal_set_mode(struct thermal_zone_device *tzdev,
 
 	if (mode == THERMAL_DEVICE_ENABLED)
 		tzdev->polling_delay = thermal->polling_delay;
-	else
+	else if (mode == THERMAL_DEVICE_DISABLED)
 		tzdev->polling_delay = 0;
+	else
+		return -EINVAL;
 
 	mutex_unlock(&tzdev->lock);
 
@@ -486,8 +488,10 @@  static int mlxsw_thermal_module_mode_set(struct thermal_zone_device *tzdev,
 
 	if (mode == THERMAL_DEVICE_ENABLED)
 		tzdev->polling_delay = thermal->polling_delay;
-	else
+	else if (mode == THERMAL_DEVICE_DISABLED)
 		tzdev->polling_delay = 0;
+	else
+		return -EINVAL;
 
 	mutex_unlock(&tzdev->lock);
 
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 8cc86f4e3ac1..d5188c1d688b 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -431,6 +431,10 @@  static int acerhdf_get_mode(struct thermal_zone_device *thermal,
 static int acerhdf_set_mode(struct thermal_zone_device *thermal,
 			    enum thermal_device_mode mode)
 {
+	if (mode != THERMAL_DEVICE_DISABLED &&
+	    mode != THERMAL_DEVICE_ENABLED)
+		return -EINVAL;
+
 	if (mode == THERMAL_DEVICE_DISABLED && kernelmode)
 		acerhdf_revert_to_bios_mode();
 	else if (mode == THERMAL_DEVICE_ENABLED && !kernelmode)
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index bb6754a5342c..014512581918 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -368,7 +368,7 @@  static int imx_set_mode(struct thermal_zone_device *tz,
 			data->irq_enabled = true;
 			enable_irq(data->irq);
 		}
-	} else {
+	} else if (mode == THERMAL_DEVICE_DISABLED) {
 		regmap_write(map, soc_data->sensor_ctrl + REG_CLR,
 			     soc_data->measure_temp_mask);
 		regmap_write(map, soc_data->sensor_ctrl + REG_SET,
@@ -381,6 +381,8 @@  static int imx_set_mode(struct thermal_zone_device *tz,
 			disable_irq(data->irq);
 			data->irq_enabled = false;
 		}
+	} else {
+		return -EINVAL;
 	}
 
 	data->mode = mode;
diff --git a/drivers/thermal/intel/intel_quark_dts_thermal.c b/drivers/thermal/intel/intel_quark_dts_thermal.c
index 5d33b350da1c..5f4bcc0e4fd3 100644
--- a/drivers/thermal/intel/intel_quark_dts_thermal.c
+++ b/drivers/thermal/intel/intel_quark_dts_thermal.c
@@ -328,8 +328,11 @@  static int sys_set_mode(struct thermal_zone_device *tzd,
 	mutex_lock(&dts_update_mutex);
 	if (mode == THERMAL_DEVICE_ENABLED)
 		ret = soc_dts_enable(tzd);
-	else
+	else if (mode == THERMAL_DEVICE_DISABLED)
 		ret = soc_dts_disable(tzd);
+	else
+		return -EINVAL;
+
 	mutex_unlock(&dts_update_mutex);
 
 	return ret;
diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index ef0baa954ff0..b7621dfab17c 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -289,9 +289,11 @@  static int of_thermal_set_mode(struct thermal_zone_device *tz,
 	if (mode == THERMAL_DEVICE_ENABLED) {
 		tz->polling_delay = data->polling_delay;
 		tz->passive_delay = data->passive_delay;
-	} else {
+	} else if (mode == THERMAL_DEVICE_DISABLED) {
 		tz->polling_delay = 0;
 		tz->passive_delay = 0;
+	} else {
+		return -EINVAL;
 	}
 
 	mutex_unlock(&tz->lock);