From: Guenter Roeck <linux@roeck-us.net>
To: linux-hwmon@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org,
openbmc@lists.ozlabs.org, linux-pm@vger.kernel.org
Cc: Jean Delvare <jdelvare@suse.com>,
Tomer Maimon <tmaimon77@gmail.com>, Nancy Yuen <yuenn@google.com>,
Andrew Jeffery <andrew@aj.id.au>,
Patrick Venture <venture@google.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Kamil Debski <kamil@wypas.org>,
Tali Perry <tali.perry1@gmail.com>,
Eduardo Valentin <edubezval@gmail.com>,
Avi Fishman <avifishman70@gmail.com>,
Joel Stanley <joel@jms.id.au>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Zhang Rui <rui.zhang@intel.com>,
Guenter Roeck <linux@roeck-us.net>,
Benjamin Fair <benjaminfair@google.com>
Subject: [PATCH 3/6] hwmon: (gpio-fan) Use devm_thermal_of_cooling_device_register
Date: Thu, 18 Apr 2019 12:58:17 -0700 [thread overview]
Message-ID: <1555617500-10862-4-git-send-email-linux@roeck-us.net> (raw)
In-Reply-To: <1555617500-10862-1-git-send-email-linux@roeck-us.net>
Call devm_thermal_of_cooling_device_register() to register the cooling
device. Also use devm_add_action_or_reset() to stop the fan on device
removal. This fixes a race condition since the fan was stopped before
the hwmon device was removed.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
drivers/hwmon/gpio-fan.c | 25 +++++++++----------------
1 file changed, 9 insertions(+), 16 deletions(-)
diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index f1bf67aca9e8..3f6e5b4e3997 100644
--- a/drivers/hwmon/gpio-fan.c
+++ b/drivers/hwmon/gpio-fan.c
@@ -498,6 +498,11 @@ static const struct of_device_id of_gpio_fan_match[] = {
};
MODULE_DEVICE_TABLE(of, of_gpio_fan_match);
+static void gpio_fan_stop(void *data)
+{
+ set_fan_speed(data, 0);
+}
+
static int gpio_fan_probe(struct platform_device *pdev)
{
int err;
@@ -532,6 +537,7 @@ static int gpio_fan_probe(struct platform_device *pdev)
err = fan_ctrl_init(fan_data);
if (err)
return err;
+ devm_add_action_or_reset(dev, gpio_fan_stop, fan_data);
}
/* Make this driver part of hwmon class. */
@@ -543,32 +549,20 @@ static int gpio_fan_probe(struct platform_device *pdev)
return PTR_ERR(fan_data->hwmon_dev);
/* Optional cooling device register for Device tree platforms */
- fan_data->cdev = thermal_of_cooling_device_register(np,
- "gpio-fan",
- fan_data,
- &gpio_fan_cool_ops);
+ fan_data->cdev = devm_thermal_of_cooling_device_register(dev, np,
+ "gpio-fan", fan_data, &gpio_fan_cool_ops);
dev_info(dev, "GPIO fan initialized\n");
return 0;
}
-static int gpio_fan_remove(struct platform_device *pdev)
+static void gpio_fan_shutdown(struct platform_device *pdev)
{
struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
- if (!IS_ERR(fan_data->cdev))
- thermal_cooling_device_unregister(fan_data->cdev);
-
if (fan_data->gpios)
set_fan_speed(fan_data, 0);
-
- return 0;
-}
-
-static void gpio_fan_shutdown(struct platform_device *pdev)
-{
- gpio_fan_remove(pdev);
}
#ifdef CONFIG_PM_SLEEP
@@ -602,7 +596,6 @@ static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
static struct platform_driver gpio_fan_driver = {
.probe = gpio_fan_probe,
- .remove = gpio_fan_remove,
.shutdown = gpio_fan_shutdown,
.driver = {
.name = "gpio-fan",
--
2.7.4
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next prev parent reply other threads:[~2019-04-18 19:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-18 19:58 [PATCH 0/6] thermal: Introduce devm_thermal_of_cooling_device_register Guenter Roeck
2019-04-18 19:58 ` [PATCH 1/6] " Guenter Roeck
2019-05-01 16:48 ` Guenter Roeck
2019-05-03 8:04 ` Daniel Lezcano
2019-05-11 19:04 ` Eduardo Valentin
2019-05-11 20:22 ` Guenter Roeck
2019-04-18 19:58 ` [PATCH 2/6] hwmon: (aspeed-pwm-tacho) Use devm_thermal_of_cooling_device_register Guenter Roeck
2019-04-18 20:35 ` Patrick Venture
2019-04-18 19:58 ` Guenter Roeck [this message]
2019-04-18 19:58 ` [PATCH 4/6] hwmon: (mlxreg-fan) " Guenter Roeck
2019-04-18 19:58 ` [PATCH 5/6] hwmon: (npcm750-pwm-fan) " Guenter Roeck
2019-04-18 19:58 ` [PATCH 6/6] hwmon: (pwm-fan) " Guenter Roeck
[not found] ` <CGME20190520152123eucas1p1b4ea0e5743585885ba0dcbe5e6a8fd92@eucas1p1.samsung.com>
2019-05-20 15:21 ` Marek Szyprowski
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