From 2e5e8fd1ff9d802ab74df1ceaa5243da30491a45 Mon Sep 17 00:00:00 2001 From: Shilpasri G Bhat Date: Thu, 23 Jul 2015 12:20:27 +0530 Subject: cpupower: Do not change the frequency of offline cpu Check if the cpu is online before changing the frequency/governor of the cpu. Reported-by: Pavaman Subramaniyam Signed-off-by: Shilpasri G Bhat Reviewed-by: Gautham R. Shenoy Acked-by: Thomas Renninger Signed-off-by: Rafael J. Wysocki --- tools/power/cpupower/utils/cpufreq-set.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tools/power/cpupower') diff --git a/tools/power/cpupower/utils/cpufreq-set.c b/tools/power/cpupower/utils/cpufreq-set.c index f656e585ed45..4e213576381e 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) { -- cgit v1.2.3