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authorGuenter Roeck <linux@roeck-us.net>2019-04-08 21:38:46 +0200
committerWim Van Sebroeck <wim@linux-watchdog.org>2019-05-05 21:02:22 +0200
commit80cb6bddeb7dcea2baf793ec8905ac1746b2fc0a (patch)
tree2cef76455190cc44259772319b5b5bcd89198831
parentwatchdog: lpc18xx_wdt: Convert to use device managed functions and other impr... (diff)
downloadlinux-80cb6bddeb7dcea2baf793ec8905ac1746b2fc0a.tar.xz
linux-80cb6bddeb7dcea2baf793ec8905ac1746b2fc0a.zip
watchdog: max63xx_wdt: Convert to use device managed functions and other improvements
Use device managed functions to simplify error handling, reduce source code size, improve readability, and reduce the likelyhood of bugs. Other improvements as listed below. The conversion was done automatically with coccinelle using the following semantic patches. The semantic patches and the scripts used to generate this commit log are available at https://github.com/groeck/coccinelle-patches - Drop assignments to otherwise unused variables - Drop empty remove function - Introduce local variable 'struct device *dev' and use it instead of dereferencing it repeatedly - Use devm_watchdog_register_driver() to register watchdog device Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
-rw-r--r--drivers/watchdog/max63xx_wdt.c20
1 files changed, 6 insertions, 14 deletions
diff --git a/drivers/watchdog/max63xx_wdt.c b/drivers/watchdog/max63xx_wdt.c
index 5aaf13e5115a..3a899628a834 100644
--- a/drivers/watchdog/max63xx_wdt.c
+++ b/drivers/watchdog/max63xx_wdt.c
@@ -200,11 +200,12 @@ static int max63xx_mmap_init(struct platform_device *p, struct max63xx_wdt *wdt)
static int max63xx_wdt_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct max63xx_wdt *wdt;
struct max63xx_timeout *table;
int err;
- wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
+ wdt = devm_kzalloc(dev, sizeof(*wdt), GFP_KERNEL);
if (!wdt)
return -ENOMEM;
@@ -215,7 +216,7 @@ static int max63xx_wdt_probe(struct platform_device *pdev)
wdt->timeout = max63xx_select_timeout(table, heartbeat);
if (!wdt->timeout) {
- dev_err(&pdev->dev, "unable to satisfy %ds heartbeat request\n",
+ dev_err(dev, "unable to satisfy %ds heartbeat request\n",
heartbeat);
return -EINVAL;
}
@@ -227,30 +228,22 @@ static int max63xx_wdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &wdt->wdd);
watchdog_set_drvdata(&wdt->wdd, wdt);
- wdt->wdd.parent = &pdev->dev;
+ wdt->wdd.parent = dev;
wdt->wdd.timeout = wdt->timeout->twd;
wdt->wdd.info = &max63xx_wdt_info;
wdt->wdd.ops = &max63xx_wdt_ops;
watchdog_set_nowayout(&wdt->wdd, nowayout);
- err = watchdog_register_device(&wdt->wdd);
+ err = devm_watchdog_register_device(dev, &wdt->wdd);
if (err)
return err;
- dev_info(&pdev->dev, "using %ds heartbeat with %ds initial delay\n",
+ dev_info(dev, "using %ds heartbeat with %ds initial delay\n",
wdt->timeout->twd, wdt->timeout->tdelay);
return 0;
}
-static int max63xx_wdt_remove(struct platform_device *pdev)
-{
- struct watchdog_device *wdd = platform_get_drvdata(pdev);
-
- watchdog_unregister_device(wdd);
- return 0;
-}
-
static const struct platform_device_id max63xx_id_table[] = {
{ "max6369_wdt", (kernel_ulong_t)max6369_table, },
{ "max6370_wdt", (kernel_ulong_t)max6369_table, },
@@ -264,7 +257,6 @@ MODULE_DEVICE_TABLE(platform, max63xx_id_table);
static struct platform_driver max63xx_wdt_driver = {
.probe = max63xx_wdt_probe,
- .remove = max63xx_wdt_remove,
.id_table = max63xx_id_table,
.driver = {
.name = "max63xx_wdt",