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Date:   Sat, 13 Feb 2021 14:18:48 +0200
From:   Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
To:     mazziesaccount@gmail.com, matti.vaittinen@fi.rohmeurope.com
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Guenter Roeck <linux@roeck-us.net>,
        Wim Van Sebroeck <wim@linux-watchdog.org>,
        linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org
Subject: [RFC PATCH 7/7] watchdog: retu_wdt: Clean-up by using managed work
 init
Message-ID: <f157b14a3bd03cb94c9d11e3a6fc995bf4245edf.1613216412.git.matti.vaittinen@fi.rohmeurope.com>
References: <cover.1613216412.git.matti.vaittinen@fi.rohmeurope.com>
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In-Reply-To: <cover.1613216412.git.matti.vaittinen@fi.rohmeurope.com>
Precedence: bulk

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.vaittinen@fi.rohmeurope.com>
---
 drivers/watchdog/retu_wdt.c | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/watchdog/retu_wdt.c b/drivers/watchdog/retu_wdt.c
index 258dfcf9cbda..3b65bdaf54b4 100644
--- a/drivers/watchdog/retu_wdt.c
+++ b/drivers/watchdog/retu_wdt.c
@@ -127,9 +127,12 @@ static int retu_wdt_probe(struct platform_device *pdev)
 	wdev->rdev		= rdev;
 	wdev->dev		= &pdev->dev;
 
-	INIT_DELAYED_WORK(&wdev->ping_work, retu_wdt_ping_work);
+	ret = devm_delayed_work_autocancel(&pdev->dev, &wdev->ping_work,
+					   retu_wdt_ping_work);
+	if (ret)
+		return ret;
 
-	ret = watchdog_register_device(retu_wdt);
+	ret = devm_watchdog_register_device(&pdev->dev, retu_wdt);
 	if (ret < 0)
 		return ret;
 
@@ -138,25 +141,11 @@ static int retu_wdt_probe(struct platform_device *pdev)
 	else
 		retu_wdt_ping_enable(wdev);
 
-	platform_set_drvdata(pdev, retu_wdt);
-
-	return 0;
-}
-
-static int retu_wdt_remove(struct platform_device *pdev)
-{
-	struct watchdog_device *wdog = platform_get_drvdata(pdev);
-	struct retu_wdt_dev *wdev = watchdog_get_drvdata(wdog);
-
-	watchdog_unregister_device(wdog);
-	cancel_delayed_work_sync(&wdev->ping_work);
-
 	return 0;
 }
 
 static struct platform_driver retu_wdt_driver = {
 	.probe		= retu_wdt_probe,
-	.remove		= retu_wdt_remove,
 	.driver		= {
 		.name	= "retu-wdt",
 	},
-- 
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 =]