From patchwork Thu Jul 7 08:01:36 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Lezcano X-Patchwork-Id: 71535 Delivered-To: patch@linaro.org Received: by 10.140.28.4 with SMTP id 4csp1275277qgy; Thu, 7 Jul 2016 01:12:20 -0700 (PDT) X-Received: by 10.66.120.138 with SMTP id lc10mr49727322pab.33.1467879140376; Thu, 07 Jul 2016 01:12:20 -0700 (PDT) Return-Path: Received: from bombadil.infradead.org (bombadil.infradead.org. [2001:1868:205::9]) by mx.google.com with ESMTPS id s9si4696192pay.67.2016.07.07.01.12.20 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 07 Jul 2016 01:12:20 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) client-ip=2001:1868:205::9; Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@linaro.org; spf=pass (google.com: best guess record for domain of linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org designates 2001:1868:205::9 as permitted sender) smtp.mailfrom=linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org; dmarc=fail (p=NONE dis=NONE) header.from=linaro.org Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bL4OX-0000Cb-06; Thu, 07 Jul 2016 08:10:49 +0000 Received: from mail-wm0-x231.google.com ([2a00:1450:400c:c09::231]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bL4IJ-0005K0-FH for linux-arm-kernel@lists.infradead.org; Thu, 07 Jul 2016 08:04:29 +0000 Received: by mail-wm0-x231.google.com with SMTP id n127so5824631wme.1 for ; Thu, 07 Jul 2016 01:04:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=LgbT7auWZxM6lUAo9JR9uoM7u/K6dv/nhBdNnk2Ics0=; b=LK8MPW/YXhMbP0QQqTR3rlH2MkanGbfCNBkidPiwLt2nwxe0NClSIfhT17DuJfzFDj jPxVOYba53RyjbP9R69fHqtPcnl48qvaIK8Hm+5zgQavC3S0KVHm758j+rHhySY47QM1 zzFdoxNYEDxz4WlW0c6rJjJ0MBfy8nsC5BVYg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LgbT7auWZxM6lUAo9JR9uoM7u/K6dv/nhBdNnk2Ics0=; b=jVZrY8o0RLWo0H8z6ymIg0+sz4KCRlUCsZz4jx9GIXSTOX9T86jymTlG9Q5J1zeE5n mJ9C+OtwwJHskTe7jnC4PPa+jjSgJKa86hRyYA+vIRT4UYML4hK6QSO6Nv8KfIBJF5e1 yaQ0mTLX2Pkt03tlDM216DS0Btr7rofQRKkLB6S889nNN03Eh0GJbOJK5vYbu9humyJD 5e2MW+DsFwcLCuLFGdBGqV74ZJpPKS/nm9u/18k7w9SDoRCC3LPMCc/ZawSPJE0KuOTV sCCZt+P/w8cgzjt0OwzlxlpNPK4yXWMooPdWgBiYQA1O+WEiTvIhzUbtlXLcULG46zmJ qKaA== X-Gm-Message-State: ALyK8tIcqDuoYYScAF4x16raujthnBza+XPsCDG1e2i1yjQ4qPq+T0A3eGZbHKDn2BKW7hGG X-Received: by 10.28.132.149 with SMTP id g143mr26059497wmd.100.1467878641892; Thu, 07 Jul 2016 01:04:01 -0700 (PDT) Received: from localhost.localdomain (lft31-1-88-121-166-205.fbx.proxad.net. [88.121.166.205]) by smtp.gmail.com with ESMTPSA id v70sm51327wmf.18.2016.07.07.01.04.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 07 Jul 2016 01:04:01 -0700 (PDT) From: Daniel Lezcano To: tglx@linutronix.de, daniel.lezcano@linaro.org Subject: [PATCH 63/93] clocksource/drivers/vt8500: Convert init function to return error Date: Thu, 7 Jul 2016 10:01:36 +0200 Message-Id: <1467878526-1238-63-git-send-email-daniel.lezcano@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1467878526-1238-1-git-send-email-daniel.lezcano@linaro.org> References: <577E0BED.3020608@linaro.org> <1467878526-1238-1-git-send-email-daniel.lezcano@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20160707_010424_213876_A5FF3E7B X-CRM114-Status: GOOD ( 15.47 ) X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2a00:1450:400c:c09:0:0:0:231 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patch=linaro.org@lists.infradead.org The init functions do not return any error. They behave as the following: - panic, thus leading to a kernel crash while another timer may work and make the system boot up correctly or - print an error and let the caller unaware if the state of the system Change that by converting the init functions to return an error conforming to the CLOCKSOURCE_OF_RET prototype. Proper error handling (rollback, errno value) will be changed later case by case, thus this change just return back an error or success in the init function. Signed-off-by: Daniel Lezcano --- drivers/clocksource/vt8500_timer.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-) -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c index ddb4092..1bc8707 100644 --- a/drivers/clocksource/vt8500_timer.c +++ b/drivers/clocksource/vt8500_timer.c @@ -121,38 +121,48 @@ static struct irqaction irq = { .dev_id = &clockevent, }; -static void __init vt8500_timer_init(struct device_node *np) +static int __init vt8500_timer_init(struct device_node *np) { - int timer_irq; + int timer_irq, ret; regbase = of_iomap(np, 0); if (!regbase) { pr_err("%s: Missing iobase description in Device Tree\n", __func__); - return; + return -ENXIO; } + timer_irq = irq_of_parse_and_map(np, 0); if (!timer_irq) { pr_err("%s: Missing irq description in Device Tree\n", __func__); - return; + return -EINVAL; } writel(1, regbase + TIMER_CTRL_VAL); writel(0xf, regbase + TIMER_STATUS_VAL); writel(~0, regbase + TIMER_MATCH_VAL); - if (clocksource_register_hz(&clocksource, VT8500_TIMER_HZ)) + ret = clocksource_register_hz(&clocksource, VT8500_TIMER_HZ); + if (ret) { pr_err("%s: vt8500_timer_init: clocksource_register failed for %s\n", - __func__, clocksource.name); + __func__, clocksource.name); + return ret; + } clockevent.cpumask = cpumask_of(0); - if (setup_irq(timer_irq, &irq)) + ret = setup_irq(timer_irq, &irq); + if (ret) { pr_err("%s: setup_irq failed for %s\n", __func__, clockevent.name); + return ret; + } + clockevents_config_and_register(&clockevent, VT8500_TIMER_HZ, MIN_OSCR_DELTA * 2, 0xf0000000); + + return 0; } -CLOCKSOURCE_OF_DECLARE(vt8500, "via,vt8500-timer", vt8500_timer_init); +CLOCKSOURCE_OF_DECLARE_RET(vt8500, "via,vt8500-timer", vt8500_timer_init);