From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934470Ab3FSIyd (ORCPT ); Wed, 19 Jun 2013 04:54:33 -0400 Received: from mail-pa0-f52.google.com ([209.85.220.52]:38656 "EHLO mail-pa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934435Ab3FSIyF (ORCPT ); Wed, 19 Jun 2013 04:54:05 -0400 From: Viresh Kumar To: rjw@sisk.pl Cc: linaro-kernel@lists.linaro.org, patches@linaro.org, cpufreq@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, robin.randhawa@arm.com, Steve.Bannister@arm.com, Liviu.Dudau@arm.com, charles.garcia-tobin@arm.com, arvind.chauhan@arm.com, dave.martin@arm.com, Viresh Kumar , Sekhar Nori Subject: [PATCH 03/13] cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases Date: Wed, 19 Jun 2013 14:22:57 +0530 Message-Id: <6e65891cd3e33c5db94563a387832ae648ef0d8c.1371630975.git.viresh.kumar@linaro.org> X-Mailer: git-send-email 1.7.12.rc2.18.g61b472e In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both should be called or both shouldn't be. In case we have started PRECHANGE notifier and found an error, we must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of calling notifiers is complete. Davinci driver was taking care of it but frequency isn't restored to freqs.old. This patch fixes it. Cc: Sekhar Nori Signed-off-by: Viresh Kumar --- drivers/cpufreq/davinci-cpufreq.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/cpufreq/davinci-cpufreq.c b/drivers/cpufreq/davinci-cpufreq.c index c33c76c..551dd65 100644 --- a/drivers/cpufreq/davinci-cpufreq.c +++ b/drivers/cpufreq/davinci-cpufreq.c @@ -114,6 +114,9 @@ static int davinci_target(struct cpufreq_policy *policy, pdata->set_voltage(idx); out: + if (ret) + freqs.new = freqs.old; + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); return ret; -- 1.7.12.rc2.18.g61b472e