Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934415Ab3FSIxk (ORCPT ); Wed, 19 Jun 2013 04:53:40 -0400 Received: from mail-pb0-f41.google.com ([209.85.160.41]:49073 "EHLO mail-pb0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934071Ab3FSIxg (ORCPT ); Wed, 19 Jun 2013 04:53:36 -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 , Borislav Petkov Subject: [PATCH 01/13] cpufreq: acpi: call CPUFREQ_POSTCHANGE notfier in error cases Date: Wed, 19 Jun 2013 14:22:55 +0530 Message-Id: <27d5d1fbc05f7cd41a566ca430cbd432804a5acd.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 Content-Length: 1363 Lines: 44 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. This patch fixes it. Cc: Borislav Petkov Signed-off-by: Viresh Kumar --- drivers/cpufreq/acpi-cpufreq.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index edc089e..223ddf4 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -494,12 +494,14 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, pr_debug("acpi_cpufreq_target failed (%d)\n", policy->cpu); result = -EAGAIN; - goto out; + freqs.new = freqs.old; } } cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - perf->state = next_perf_state; + + if (!result) + perf->state = next_perf_state; out: return result; -- 1.7.12.rc2.18.g61b472e -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/