[PATCH 39/62] watchdog: of_xilinx_wdt: Convert to use device managed functions
From: linux@roeck-us.net (Guenter Roeck)
Date: 2017-01-11 00:49:27
Also in:
linux-watchdog, lkml
Subsystem:
the rest, watchdog device drivers, xilinx watchdog driver · Maintainers:
Linus Torvalds, Wim Van Sebroeck, Guenter Roeck, Srinivas Neeli
Use device managed functions to simplify error handling, reduce source code size, improve readability, and reduce the likelyhood of bugs. 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 - Use devm_add_action_or_reset() for calls to clk_disable_unprepare - Replace 'goto l; ... l: return e;' with 'return e;' - Drop assignments to otherwise unused variables - Drop remove function - Drop platform_set_drvdata() - Use devm_watchdog_register_driver() to register watchdog device Cc: Michal Simek <redacted> Cc: "S?ren Brinkmann" <redacted> Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- drivers/watchdog/of_xilinx_wdt.c | 28 ++++++++-------------------- 1 file changed, 8 insertions(+), 20 deletions(-)
diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
index fae7fe929ea3..277de711c31f 100644
--- a/drivers/watchdog/of_xilinx_wdt.c
+++ b/drivers/watchdog/of_xilinx_wdt.c@@ -210,38 +210,27 @@ static int xwdt_probe(struct platform_device *pdev) dev_err(&pdev->dev, "unable to enable clock\n"); return rc; } + rc = devm_add_action_or_reset(&pdev->dev, + (void(*)(void *))clk_disable_unprepare, + xdev->clk); + if (rc) + return rc; rc = xwdt_selftest(xdev); if (rc == XWT_TIMER_FAILED) { dev_err(&pdev->dev, "SelfTest routine error\n"); - goto err_clk_disable; + return rc; } - rc = watchdog_register_device(xilinx_wdt_wdd); + rc = devm_watchdog_register_device(&pdev->dev, xilinx_wdt_wdd); if (rc) { dev_err(&pdev->dev, "Cannot register watchdog (err=%d)\n", rc); - goto err_clk_disable; + return rc; } dev_info(&pdev->dev, "Xilinx Watchdog Timer at %p with timeout %ds\n", xdev->base, xilinx_wdt_wdd->timeout); - platform_set_drvdata(pdev, xdev); - - return 0; -err_clk_disable: - clk_disable_unprepare(xdev->clk); - - return rc; -} - -static int xwdt_remove(struct platform_device *pdev) -{ - struct xwdt_device *xdev = platform_get_drvdata(pdev); - - watchdog_unregister_device(&xdev->xilinx_wdt_wdd); - clk_disable_unprepare(xdev->clk); - return 0; }
@@ -255,7 +244,6 @@ MODULE_DEVICE_TABLE(of, xwdt_of_match); static struct platform_driver xwdt_driver = { .probe = xwdt_probe, - .remove = xwdt_remove, .driver = { .name = WATCHDOG_NAME, .of_match_table = xwdt_of_match,
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2.7.4