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authorZhang Rui <rui.zhang@intel.com>2024-02-06 04:54:09 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2024-02-12 20:41:38 +0300
commit7251b9e8a007ddd834aa81f8c7ea338884629fec (patch)
tree074acee02e54f1b76e7ed451d30d57c1e6084402 /drivers/thermal/intel
parent841c35169323cd833294798e58b9bf63fa4fa1de (diff)
downloadlinux-7251b9e8a007ddd834aa81f8c7ea338884629fec.tar.xz
thermal/intel: Fix intel_tcc_get_temp() to support negative CPU temperature
CPU temperature can be negative in some cases. Thus the negative CPU temperature should not be considered as a failure. Fix intel_tcc_get_temp() and its users to support negative CPU temperature. Fixes: a3c1f066e1c5 ("thermal/intel: Introduce Intel TCC library") Signed-off-by: Zhang Rui <rui.zhang@intel.com> Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com> Cc: 6.3+ <stable@vger.kernel.org> # 6.3+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/thermal/intel')
-rw-r--r--drivers/thermal/intel/int340x_thermal/processor_thermal_device.c8
-rw-r--r--drivers/thermal/intel/intel_tcc.c12
-rw-r--r--drivers/thermal/intel/x86_pkg_temp_thermal.c8
3 files changed, 14 insertions, 14 deletions
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
index 649f67fdf345..d75fae7b7ed2 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
@@ -176,14 +176,14 @@ static int proc_thermal_get_zone_temp(struct thermal_zone_device *zone,
int *temp)
{
int cpu;
- int curr_temp;
+ int curr_temp, ret;
*temp = 0;
for_each_online_cpu(cpu) {
- curr_temp = intel_tcc_get_temp(cpu, false);
- if (curr_temp < 0)
- return curr_temp;
+ ret = intel_tcc_get_temp(cpu, &curr_temp, false);
+ if (ret < 0)
+ return ret;
if (!*temp || curr_temp > *temp)
*temp = curr_temp;
}
diff --git a/drivers/thermal/intel/intel_tcc.c b/drivers/thermal/intel/intel_tcc.c
index 2e5c741c41ca..5e8b7f34b395 100644
--- a/drivers/thermal/intel/intel_tcc.c
+++ b/drivers/thermal/intel/intel_tcc.c
@@ -103,18 +103,19 @@ EXPORT_SYMBOL_NS_GPL(intel_tcc_set_offset, INTEL_TCC);
/**
* intel_tcc_get_temp() - returns the current temperature
* @cpu: cpu that the MSR should be run on, nagative value means any cpu.
+ * @temp: pointer to the memory for saving cpu temperature.
* @pkg: true: Package Thermal Sensor. false: Core Thermal Sensor.
*
* Get the current temperature returned by the CPU core/package level
* thermal sensor, in degrees C.
*
- * Return: Temperature in degrees C on success, negative error code otherwise.
+ * Return: 0 on success, negative error code otherwise.
*/
-int intel_tcc_get_temp(int cpu, bool pkg)
+int intel_tcc_get_temp(int cpu, int *temp, bool pkg)
{
u32 low, high;
u32 msr = pkg ? MSR_IA32_PACKAGE_THERM_STATUS : MSR_IA32_THERM_STATUS;
- int tjmax, temp, err;
+ int tjmax, err;
tjmax = intel_tcc_get_tjmax(cpu);
if (tjmax < 0)
@@ -131,9 +132,8 @@ int intel_tcc_get_temp(int cpu, bool pkg)
if (!(low & BIT(31)))
return -ENODATA;
- temp = tjmax - ((low >> 16) & 0x7f);
+ *temp = tjmax - ((low >> 16) & 0x7f);
- /* Do not allow negative CPU temperature */
- return temp >= 0 ? temp : -ENODATA;
+ return 0;
}
EXPORT_SYMBOL_NS_GPL(intel_tcc_get_temp, INTEL_TCC);
diff --git a/drivers/thermal/intel/x86_pkg_temp_thermal.c b/drivers/thermal/intel/x86_pkg_temp_thermal.c
index 11a7f8108bbb..61c3d450ee60 100644
--- a/drivers/thermal/intel/x86_pkg_temp_thermal.c
+++ b/drivers/thermal/intel/x86_pkg_temp_thermal.c
@@ -108,11 +108,11 @@ static struct zone_device *pkg_temp_thermal_get_dev(unsigned int cpu)
static int sys_get_curr_temp(struct thermal_zone_device *tzd, int *temp)
{
struct zone_device *zonedev = thermal_zone_device_priv(tzd);
- int val;
+ int val, ret;
- val = intel_tcc_get_temp(zonedev->cpu, true);
- if (val < 0)
- return val;
+ ret = intel_tcc_get_temp(zonedev->cpu, &val, true);
+ if (ret < 0)
+ return ret;
*temp = val * 1000;
pr_debug("sys_get_curr_temp %d\n", *temp);