linux/drivers/thermal/gov_user_space.c
Rafael J. Wysocki 567af70520 thermal: Replace pr_warn() with pr_warn_once() in user_space_bind()
Use pr_warn_once() instead of pr_warn() to print the user space
governor deprecation message in user_space_bind() to reduce the
kernel log noise.

Fixes: 0275c9fb0e ("thermal/core: Make the userspace governor deprecated")
Reported-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
2021-11-05 17:47:14 +01:00

57 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* user_space.c - A simple user space Thermal events notifier
*
* Copyright (C) 2012 Intel Corp
* Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/slab.h>
#include <linux/thermal.h>
#include "thermal_core.h"
static int user_space_bind(struct thermal_zone_device *tz)
{
pr_warn_once("Userspace governor deprecated: use thermal netlink " \
"notification instead\n");
return 0;
}
/**
* notify_user_space - Notifies user space about thermal events
* @tz: thermal_zone_device
* @trip: trip point index
*
* This function notifies the user space through UEvents.
*/
static int notify_user_space(struct thermal_zone_device *tz, int trip)
{
char *thermal_prop[5];
int i;
mutex_lock(&tz->lock);
thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
thermal_prop[4] = NULL;
kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
for (i = 0; i < 4; ++i)
kfree(thermal_prop[i]);
mutex_unlock(&tz->lock);
return 0;
}
static struct thermal_governor thermal_gov_user_space = {
.name = "user_space",
.throttle = notify_user_space,
.bind_to_tz = user_space_bind,
};
THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);