From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933734AbdAJXif (ORCPT ); Tue, 10 Jan 2017 18:38:35 -0500 Received: from bh-25.webhostbox.net ([208.91.199.152]:52223 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933465AbdAJXi1 (ORCPT ); Tue, 10 Jan 2017 18:38:27 -0500 From: Guenter Roeck To: Wim Van Sebroeck Cc: linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, Guenter Roeck , Keguang Zhang , linux-mips@linux-mips.org Subject: [PATCH 26/62] watchdog: loongson1_wdt: Convert to use device managed functions Date: Tue, 10 Jan 2017 15:34:43 -0800 Message-Id: <1484091325-9199-27-git-send-email-linux@roeck-us.net> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1484091325-9199-1-git-send-email-linux@roeck-us.net> References: <1484091325-9199-1-git-send-email-linux@roeck-us.net> X-Authenticated_sender: guenter@roeck-us.net X-OutGoing-Spam-Status: No, score=-1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: guenter@roeck-us.net X-Authenticated-Sender: bh-25.webhostbox.net: guenter@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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;' - Replace 'val = e; return val;' with 'return e;' - Drop assignments to otherwise unused variables - Replace 'if (e) { return expr; }' with 'if (e) return expr;' - Drop remove function - Drop platform_set_drvdata() - Use devm_watchdog_register_driver() to register watchdog device Cc: Keguang Zhang Signed-off-by: Guenter Roeck --- drivers/watchdog/loongson1_wdt.c | 31 +++++++++---------------------- 1 file changed, 9 insertions(+), 22 deletions(-) diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c index 3aee50c64a36..36f0c7e02745 100644 --- a/drivers/watchdog/loongson1_wdt.c +++ b/drivers/watchdog/loongson1_wdt.c @@ -109,12 +109,15 @@ static int ls1x_wdt_probe(struct platform_device *pdev) dev_err(&pdev->dev, "clk enable failed\n"); return err; } + err = devm_add_action_or_reset(&pdev->dev, + (void(*)(void *))clk_disable_unprepare, + drvdata->clk); + if (err) + return err; clk_rate = clk_get_rate(drvdata->clk); - if (!clk_rate) { - err = -EINVAL; - goto err0; - } + if (!clk_rate) + return -EINVAL; drvdata->clk_rate = clk_rate; ls1x_wdt = &drvdata->wdt; @@ -129,35 +132,19 @@ static int ls1x_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(ls1x_wdt, nowayout); watchdog_set_drvdata(ls1x_wdt, drvdata); - err = watchdog_register_device(&drvdata->wdt); + err = devm_watchdog_register_device(&pdev->dev, &drvdata->wdt); if (err) { dev_err(&pdev->dev, "failed to register watchdog device\n"); - goto err0; + return err; } - platform_set_drvdata(pdev, drvdata); - dev_info(&pdev->dev, "Loongson1 Watchdog driver registered\n"); return 0; -err0: - clk_disable_unprepare(drvdata->clk); - return err; -} - -static int ls1x_wdt_remove(struct platform_device *pdev) -{ - struct ls1x_wdt_drvdata *drvdata = platform_get_drvdata(pdev); - - watchdog_unregister_device(&drvdata->wdt); - clk_disable_unprepare(drvdata->clk); - - return 0; } static struct platform_driver ls1x_wdt_driver = { .probe = ls1x_wdt_probe, - .remove = ls1x_wdt_remove, .driver = { .name = "ls1x-wdt", }, -- 2.7.4