From patchwork Wed Jan 22 23:05:00 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ezequiel Garcia X-Patchwork-Id: 3525851 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0FFC59F1C3 for ; Wed, 22 Jan 2014 23:07:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 36D5A201B6 for ; Wed, 22 Jan 2014 23:07:46 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 31ECD200E0 for ; Wed, 22 Jan 2014 23:07:45 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1W66sQ-0000vh-AR; Wed, 22 Jan 2014 23:06:30 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W66s3-0007m0-TQ; Wed, 22 Jan 2014 23:06:07 +0000 Received: from top.free-electrons.com ([176.31.233.9] helo=mail.free-electrons.com) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1W66rY-0007gx-Ol for linux-arm-kernel@lists.infradead.org; Wed, 22 Jan 2014 23:05:37 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 7CB0081B; Thu, 23 Jan 2014 00:05:18 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost.localdomain (unknown [190.2.98.212]) by mail.free-electrons.com (Postfix) with ESMTPA id 74F2C7DF; Thu, 23 Jan 2014 00:05:13 +0100 (CET) From: Ezequiel Garcia To: , , Subject: [PATCH v4 03/18] watchdog: orion: Add clock error handling Date: Wed, 22 Jan 2014 20:05:00 -0300 Message-Id: <1390431915-5115-4-git-send-email-ezequiel.garcia@free-electrons.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1390431915-5115-1-git-send-email-ezequiel.garcia@free-electrons.com> References: <1390431915-5115-1-git-send-email-ezequiel.garcia@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140122_180536_902216_BBE91992 X-CRM114-Status: GOOD ( 10.68 ) X-Spam-Score: -1.8 (-) Cc: Thomas Petazzoni , Andrew Lunn , Tawfik Bayouk , Arnd Bergmann , Daniel Lezcano , Jason Gunthorpe , Wim Van Sebroeck , Lior Amsalem , Ezequiel Garcia , Gregory Clement , Fabio Estevam , Jason Cooper , Guenter Roeck , Sebastian Hesselbarth X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This commit adds a check for clk_prepare_enable success and introduces an error path to disable the clock properly. Signed-off-by: Ezequiel Garcia Reviewed-by: Guenter Roeck --- drivers/watchdog/orion_wdt.c | 29 +++++++++++++++++++---------- 1 file changed, 19 insertions(+), 10 deletions(-) diff --git a/drivers/watchdog/orion_wdt.c b/drivers/watchdog/orion_wdt.c index f7722a4..7f19fa3 100644 --- a/drivers/watchdog/orion_wdt.c +++ b/drivers/watchdog/orion_wdt.c @@ -151,17 +151,24 @@ static int orion_wdt_probe(struct platform_device *pdev) clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { dev_err(&pdev->dev, "Orion Watchdog missing clock\n"); - return -ENODEV; + return PTR_ERR(clk); } - clk_prepare_enable(clk); + ret = clk_prepare_enable(clk); + if (ret) + return ret; wdt_tclk = clk_get_rate(clk); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; + if (!res) { + ret = -ENODEV; + goto disable_clk; + } + wdt_reg = devm_ioremap(&pdev->dev, res->start, resource_size(res)); - if (!wdt_reg) - return -ENOMEM; + if (!wdt_reg) { + ret = -ENOMEM; + goto disable_clk; + } wdt_max_duration = WDT_MAX_CYCLE_COUNT / wdt_tclk; @@ -171,14 +178,16 @@ static int orion_wdt_probe(struct platform_device *pdev) watchdog_set_nowayout(&orion_wdt, nowayout); ret = watchdog_register_device(&orion_wdt); - if (ret) { - clk_disable_unprepare(clk); - return ret; - } + if (ret) + goto disable_clk; pr_info("Initial timeout %d sec%s\n", orion_wdt.timeout, nowayout ? ", nowayout" : ""); return 0; + +disable_clk: + clk_disable_unprepare(clk); + return ret; } static int orion_wdt_remove(struct platform_device *pdev)