From patchwork Sun Jul 8 17:12:16 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Borleis X-Patchwork-Id: 1169841 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 13B263FD4F for ; Sun, 8 Jul 2012 17:18:16 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Snv3l-0001vB-QI; Sun, 08 Jul 2012 17:14:13 +0000 Received: from metis.ext.pengutronix.de ([2001:6f8:1178:4:290:27ff:fe1d:cc33]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Snv2A-0001oW-Bb for linux-arm-kernel@lists.infradead.org; Sun, 08 Jul 2012 17:12:38 +0000 Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:21e:67ff:fe11:9c5c]) by metis.ext.pengutronix.de with esmtp (Exim 4.72) (envelope-from ) id 1Snv23-0006yF-Mm for linux-arm-kernel@lists.infradead.org; Sun, 08 Jul 2012 19:12:27 +0200 Received: from jbe by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1Snv22-0004YJ-NL for linux-arm-kernel@lists.infradead.org; Sun, 08 Jul 2012 19:12:26 +0200 From: Juergen Beisert To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 02/10] PLAT/Samsung/PWM: avoid division by zero Date: Sun, 8 Jul 2012 19:12:16 +0200 Message-Id: <1341767544-17447-3-git-send-email-jbe@pengutronix.de> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1341767544-17447-1-git-send-email-jbe@pengutronix.de> References: <1341767544-17447-1-git-send-email-jbe@pengutronix.de> X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c X-SA-Exim-Mail-From: jbe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-Spam-Note: CRM114 invocation failed X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The pwm-beeper driver crashes the PWM driver by calling with a period time of zero nanoseconds. Signed-off-by: Juergen Beisert --- arch/arm/plat-samsung/pwm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm/plat-samsung/pwm.c b/arch/arm/plat-samsung/pwm.c index c559d84..751a0bf 100644 --- a/arch/arm/plat-samsung/pwm.c +++ b/arch/arm/plat-samsung/pwm.c @@ -188,7 +188,10 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) tcmp = __raw_readl(S3C2410_TCMPB(pwm->pwm_id)); tcnt = __raw_readl(S3C2410_TCNTB(pwm->pwm_id)); - period = NS_IN_HZ / period_ns; + if (period_ns) + period = NS_IN_HZ / period_ns; + else + period = 0; pwm_dbg(pwm, "duty_ns=%d, period_ns=%d (%lu)\n", duty_ns, period_ns, period);