From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shilpasri G Bhat Subject: [PATCH] cpupower: Do not change the frequency of offline cpu Date: Wed, 22 Jul 2015 13:50:49 +0530 Message-ID: <1437553249-25400-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com> Return-path: Received: from e28smtp09.in.ibm.com ([122.248.162.9]:43397 "EHLO e28smtp09.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933119AbbGVIVb (ORCPT ); Wed, 22 Jul 2015 04:21:31 -0400 Received: from /spool/local by e28smtp09.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 22 Jul 2015 13:51:27 +0530 Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: rafael.j.wysocki@intel.com Cc: trenn@suse.com, peter.senna@gmail.com, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, ego@linux.vnet.ibm.com, Shilpasri G Bhat Check if the cpu is online before changing the frequency/governor of the cpu. Signed-off-by: Shilpasri G Bhat --- tools/power/cpupower/utils/cpufreq-set.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/power/cpupower/utils/cpufreq-set.c b/tools/power/cpupower/utils/cpufreq-set.c index f656e58..4e21357 100644 --- a/tools/power/cpupower/utils/cpufreq-set.c +++ b/tools/power/cpupower/utils/cpufreq-set.c @@ -17,6 +17,7 @@ #include "cpufreq.h" #include "helpers/helpers.h" +#include "helpers/sysfs.h" #define NORM_FREQ_LEN 32 @@ -318,6 +319,9 @@ int cmd_freq_set(int argc, char **argv) cpufreq_cpu_exists(cpu)) continue; + if (sysfs_is_cpu_online(cpu) != 1) + continue; + printf(_("Setting cpu: %d\n"), cpu); ret = do_one_cpu(cpu, &new_pol, freq, policychange); if (ret) { -- 1.9.3