From cb5c14ea573b625053487f9dfde395ac0e8bc11b Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 10 Jan 2017 15:21:52 -0800 Subject: [PATCH] watchdog: mena21_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 - Replace 'goto l; ... l: return e;' with 'return e;' - Drop assignments to otherwise unused variables - Drop remove function - Drop unnecessary mutex_destroy() on allocated data - Use devm_watchdog_register_driver() to register watchdog device Acked-by: Johannes Thumshirn Signed-off-by: Guenter Roeck --- drivers/watchdog/mena21_wdt.c | 24 ++---------------------- 1 file changed, 2 insertions(+), 22 deletions(-) diff --git a/drivers/watchdog/mena21_wdt.c b/drivers/watchdog/mena21_wdt.c index af6a7c489f08..045201a6fdb3 100644 --- a/drivers/watchdog/mena21_wdt.c +++ b/drivers/watchdog/mena21_wdt.c @@ -212,33 +212,14 @@ static int a21_wdt_probe(struct platform_device *pdev) drv->wdt = a21_wdt; dev_set_drvdata(&pdev->dev, drv); - ret = watchdog_register_device(&a21_wdt); + ret = devm_watchdog_register_device(&pdev->dev, &a21_wdt); if (ret) { dev_err(&pdev->dev, "Cannot register watchdog device\n"); - goto err_register_wd; + return ret; } dev_info(&pdev->dev, "MEN A21 watchdog timer driver enabled\n"); - return 0; - -err_register_wd: - mutex_destroy(&drv->lock); - - return ret; -} - -static int a21_wdt_remove(struct platform_device *pdev) -{ - struct a21_wdt_drv *drv = dev_get_drvdata(&pdev->dev); - - dev_warn(&pdev->dev, - "Unregistering A21 watchdog driver, board may reboot\n"); - - watchdog_unregister_device(&drv->wdt); - - mutex_destroy(&drv->lock); - return 0; } @@ -257,7 +238,6 @@ MODULE_DEVICE_TABLE(of, a21_wdt_ids); static struct platform_driver a21_wdt_driver = { .probe = a21_wdt_probe, - .remove = a21_wdt_remove, .shutdown = a21_wdt_shutdown, .driver = { .name = "a21-watchdog", -- 2.30.2