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authorSascha Hauer <s.hauer@pengutronix.de>2015-07-24 09:12:54 +0300
committerZhang Rui <rui.zhang@intel.com>2015-08-03 18:15:50 +0300
commit17e8351a77397e8a83727eb17e3a3e9b8ab5257a (patch)
tree9087ea501d32baa56842d112c071cbe57eede870 /drivers/thermal/thermal_hwmon.c
parent25a0a5ce16ecd7e60c4cf1436892433873e9d99d (diff)
downloadlinux-17e8351a77397e8a83727eb17e3a3e9b8ab5257a.tar.xz
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/thermal/thermal_hwmon.c')
-rw-r--r--drivers/thermal/thermal_hwmon.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/thermal/thermal_hwmon.c b/drivers/thermal/thermal_hwmon.c
index 1967bee4f076..06fd2ed9ef9d 100644
--- a/drivers/thermal/thermal_hwmon.c
+++ b/drivers/thermal/thermal_hwmon.c
@@ -69,7 +69,7 @@ static DEVICE_ATTR(name, 0444, name_show, NULL);
static ssize_t
temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
{
- long temperature;
+ int temperature;
int ret;
struct thermal_hwmon_attr *hwmon_attr
= container_of(attr, struct thermal_hwmon_attr, attr);
@@ -83,7 +83,7 @@ temp_input_show(struct device *dev, struct device_attribute *attr, char *buf)
if (ret)
return ret;
- return sprintf(buf, "%ld\n", temperature);
+ return sprintf(buf, "%d\n", temperature);
}
static ssize_t
@@ -95,14 +95,14 @@ temp_crit_show(struct device *dev, struct device_attribute *attr, char *buf)
= container_of(hwmon_attr, struct thermal_hwmon_temp,
temp_crit);
struct thermal_zone_device *tz = temp->tz;
- long temperature;
+ int temperature;
int ret;
ret = tz->ops->get_trip_temp(tz, 0, &temperature);
if (ret)
return ret;
- return sprintf(buf, "%ld\n", temperature);
+ return sprintf(buf, "%d\n", temperature);
}
@@ -142,7 +142,7 @@ thermal_hwmon_lookup_temp(const struct thermal_hwmon_device *hwmon,
static bool thermal_zone_crit_temp_valid(struct thermal_zone_device *tz)
{
- unsigned long temp;
+ int temp;
return tz->ops->get_crit_temp && !tz->ops->get_crit_temp(tz, &temp);
}