[PATCH v3 4/8] hwmon: raspberry-pi: Clean-up few drivers by using managed work init

[Matti Vaittinen]

Few drivers implement remove call-back only for ensuring a delayed
work gets cancelled prior driver removal. Clean-up these by switching
to use devm_delayed_work_autocancel() instead.

This change is compile-tested only. All testing is appreciated.

Signed-off-by: Matti Vaittinen <matti.vaitti...@fi.rohmeurope.com>
Acked-by: Guenter Roeck <li...@roeck-us.net>
---
Changelog from RFCv2:
 - RFC dropped. No functional changes.

 drivers/hwmon/raspberrypi-hwmon.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/drivers/hwmon/raspberrypi-hwmon.c 
b/drivers/hwmon/raspberrypi-hwmon.c
index d3a64a35f7a9..805d396aa81b 100644
--- a/drivers/hwmon/raspberrypi-hwmon.c
+++ b/drivers/hwmon/raspberrypi-hwmon.c
@@ -7,6 +7,7 @@
  * Copyright (C) 2018 Stefan Wahren <stefan.wah...@i2se.com>
  */
 #include <linux/device.h>
+#include <linux/devm-helpers.h>
 #include <linux/err.h>
 #include <linux/hwmon.h>
 #include <linux/module.h>
@@ -106,6 +107,7 @@ static int rpi_hwmon_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
        struct rpi_hwmon_data *data;
+       int ret;
 
        data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
        if (!data)
@@ -119,7 +121,10 @@ static int rpi_hwmon_probe(struct platform_device *pdev)
                                                               &rpi_chip_info,
                                                               NULL);
 
-       INIT_DELAYED_WORK(&data->get_values_poll_work, get_values_poll);
+       ret = devm_delayed_work_autocancel(dev, &data->get_values_poll_work,
+                                          get_values_poll);
+       if (ret)
+               return ret;
        platform_set_drvdata(pdev, data);
 
        if (!PTR_ERR_OR_ZERO(data->hwmon_dev))
@@ -128,18 +133,8 @@ static int rpi_hwmon_probe(struct platform_device *pdev)
        return PTR_ERR_OR_ZERO(data->hwmon_dev);
 }
 
-static int rpi_hwmon_remove(struct platform_device *pdev)
-{
-       struct rpi_hwmon_data *data = platform_get_drvdata(pdev);
-
-       cancel_delayed_work_sync(&data->get_values_poll_work);
-
-       return 0;
-}
-
 static struct platform_driver rpi_hwmon_driver = {
        .probe = rpi_hwmon_probe,
-       .remove = rpi_hwmon_remove,
        .driver = {
                .name = "raspberrypi-hwmon",
        },
-- 
2.25.4


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =]