567af70520
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>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* user_space.c - A simple user space Thermal events notifier
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*
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* Copyright (C) 2012 Intel Corp
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* Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <linux/slab.h>
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#include <linux/thermal.h>
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#include "thermal_core.h"
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static int user_space_bind(struct thermal_zone_device *tz)
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{
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pr_warn_once("Userspace governor deprecated: use thermal netlink " \
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"notification instead\n");
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return 0;
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}
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/**
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* notify_user_space - Notifies user space about thermal events
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* @tz: thermal_zone_device
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* @trip: trip point index
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*
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* This function notifies the user space through UEvents.
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*/
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static int notify_user_space(struct thermal_zone_device *tz, int trip)
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{
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char *thermal_prop[5];
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int i;
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mutex_lock(&tz->lock);
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thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
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thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
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thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d", trip);
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thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
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thermal_prop[4] = NULL;
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kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
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for (i = 0; i < 4; ++i)
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kfree(thermal_prop[i]);
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mutex_unlock(&tz->lock);
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return 0;
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}
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static struct thermal_governor thermal_gov_user_space = {
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.name = "user_space",
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.throttle = notify_user_space,
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.bind_to_tz = user_space_bind,
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};
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THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);
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