diff options
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/intel/intel_powerclamp.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/thermal/intel/intel_powerclamp.c b/drivers/thermal/intel/intel_powerclamp.c index 1390748706a6..5995d10b5699 100644 --- a/drivers/thermal/intel/intel_powerclamp.c +++ b/drivers/thermal/intel/intel_powerclamp.c @@ -74,6 +74,7 @@ static struct thermal_cooling_device *cooling_dev; static DEFINE_MUTEX(powerclamp_lock); +/* This duration is in microseconds */ static unsigned int duration; static unsigned int pkg_cstate_ratio_cur; static unsigned int window_size; @@ -90,23 +91,34 @@ static int duration_set(const char *arg, const struct kernel_param *kp) pr_err("Out of recommended range %lu, between 6-25ms\n", new_duration); ret = -EINVAL; + goto exit; } - duration = clamp(new_duration, 6ul, 25ul); - smp_mb(); - + mutex_lock(&powerclamp_lock); + duration = clamp(new_duration, 6ul, 25ul) * 1000; + mutex_unlock(&powerclamp_lock); exit: return ret; } +static int duration_get(char *buf, const struct kernel_param *kp) +{ + int ret; + + mutex_lock(&powerclamp_lock); + ret = sysfs_emit(buf, "%d\n", duration / 1000); + mutex_unlock(&powerclamp_lock); + + return ret; +} + static const struct kernel_param_ops duration_ops = { .set = duration_set, - .get = param_get_int, + .get = duration_get, }; - -module_param_cb(duration, &duration_ops, &duration, 0644); +module_param_cb(duration, &duration_ops, NULL, 0644); MODULE_PARM_DESC(duration, "forced idle time for each attempt in msec."); struct powerclamp_calibration_data { |