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authorSascha Hauer <s.hauer@pengutronix.de>2015-07-24 08:12:54 +0200
committerZhang Rui <rui.zhang@intel.com>2015-08-03 23:15:50 +0800
commit17e8351a77397e8a83727eb17e3a3e9b8ab5257a (patch)
tree9087ea501d32baa56842d112c071cbe57eede870 /drivers/platform
parent25a0a5ce16ecd7e60c4cf1436892433873e9d99d (diff)
downloadlinux-17e8351a77397e8a83727eb17e3a3e9b8ab5257a.tar.bz2
thermal: consistently use int for temperatures
The thermal code uses int, long and unsigned long for temperatures in different places. Using an unsigned type limits the thermal framework to positive temperatures without need. Also several drivers currently will report temperatures near UINT_MAX for temperatures below 0°C. This will probably immediately shut the machine down due to overtemperature if started below 0°C. 'long' is 64bit on several architectures. This is not needed since INT_MAX °mC is above the melting point of all known materials. Consistently use a plain 'int' for temperatures throughout the thermal code and the drivers. This only changes the places in the drivers where the temperature is passed around as pointer, when drivers internally use another type this is not changed. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Lukasz Majewski <l.majewski@samsung.com> Reviewed-by: Darren Hart <dvhart@linux.intel.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Reviewed-by: Peter Feuerer <peter@piie.net> Cc: Punit Agrawal <punit.agrawal@arm.com> Cc: Zhang Rui <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Jean Delvare <jdelvare@suse.de> Cc: Peter Feuerer <peter@piie.net> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Lukasz Majewski <l.majewski@samsung.com> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: linux-acpi@vger.kernel.org Cc: platform-driver-x86@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-omap@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org Cc: Guenter Roeck <linux@roeck-us.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Darren Hart <dvhart@infradead.org> Cc: lm-sensors@lm-sensors.org Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/acerhdf.c9
-rw-r--r--drivers/platform/x86/intel_mid_thermal.c9
2 files changed, 8 insertions, 10 deletions
diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c
index 1ef02daddb60..460fa6708bfc 100644
--- a/drivers/platform/x86/acerhdf.c
+++ b/drivers/platform/x86/acerhdf.c
@@ -346,8 +346,7 @@ static void acerhdf_check_param(struct thermal_zone_device *thermal)
* as late as the polling interval is since we can't do that in the respective
* accessors of the module parameters.
*/
-static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal,
- unsigned long *t)
+static int acerhdf_get_ec_temp(struct thermal_zone_device *thermal, int *t)
{
int temp, err = 0;
@@ -453,7 +452,7 @@ static int acerhdf_get_trip_type(struct thermal_zone_device *thermal, int trip,
}
static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip,
- unsigned long *temp)
+ int *temp)
{
if (trip != 0)
return -EINVAL;
@@ -464,7 +463,7 @@ static int acerhdf_get_trip_hyst(struct thermal_zone_device *thermal, int trip,
}
static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
- unsigned long *temp)
+ int *temp)
{
if (trip == 0)
*temp = fanon;
@@ -477,7 +476,7 @@ static int acerhdf_get_trip_temp(struct thermal_zone_device *thermal, int trip,
}
static int acerhdf_get_crit_temp(struct thermal_zone_device *thermal,
- unsigned long *temperature)
+ int *temperature)
{
*temperature = ACERHDF_TEMP_CRIT;
return 0;
diff --git a/drivers/platform/x86/intel_mid_thermal.c b/drivers/platform/x86/intel_mid_thermal.c
index 0944e834af8d..9f713b832ba3 100644
--- a/drivers/platform/x86/intel_mid_thermal.c
+++ b/drivers/platform/x86/intel_mid_thermal.c
@@ -132,7 +132,7 @@ static int is_valid_adc(uint16_t adc_val, uint16_t min, uint16_t max)
* to achieve very close approximate temp value with less than
* 0.5C error
*/
-static int adc_to_temp(int direct, uint16_t adc_val, unsigned long *tp)
+static int adc_to_temp(int direct, uint16_t adc_val, int *tp)
{
int temp;
@@ -174,14 +174,13 @@ static int adc_to_temp(int direct, uint16_t adc_val, unsigned long *tp)
*
* Can sleep
*/
-static int mid_read_temp(struct thermal_zone_device *tzd, unsigned long *temp)
+static int mid_read_temp(struct thermal_zone_device *tzd, int *temp)
{
struct thermal_device_info *td_info = tzd->devdata;
uint16_t adc_val, addr;
uint8_t data = 0;
int ret;
- unsigned long curr_temp;
-
+ int curr_temp;
addr = td_info->chnl_addr;
@@ -453,7 +452,7 @@ static SIMPLE_DEV_PM_OPS(mid_thermal_pm,
*
* Can sleep
*/
-static int read_curr_temp(struct thermal_zone_device *tzd, unsigned long *temp)
+static int read_curr_temp(struct thermal_zone_device *tzd, int *temp)
{
WARN_ON(tzd == NULL);
return mid_read_temp(tzd, temp);