When converting to a shared library in ac5a181d065d ("cpupower: Add
cpuidle parts into library"), cpu_freq_cpu_exists was converted to
cpupower_is_cpu_online. cpu_req_cpu_exists returned 0 on success and
-ENOSYS on failure whereas cpupower_is_cpu_online returns 1 on success.
Check for the correct return value in cpufreq-set.

See https://bugzilla.redhat.com/show_bug.cgi?id=1374212

Fixes: ac5a181d065d ("cpupower: Add cpuidle parts into library")
Reported-by: Julian Seward <jsew...@acm.org>
Signed-off-by: Laura Abbott <labb...@redhat.com>
---
v2: Drop another redundant cpupower_is_cpu_online
---
 tools/power/cpupower/utils/cpufreq-set.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/tools/power/cpupower/utils/cpufreq-set.c 
b/tools/power/cpupower/utils/cpufreq-set.c
index b4bf769..1eef0ae 100644
--- a/tools/power/cpupower/utils/cpufreq-set.c
+++ b/tools/power/cpupower/utils/cpufreq-set.c
@@ -296,7 +296,7 @@ int cmd_freq_set(int argc, char **argv)
                        struct cpufreq_affected_cpus *cpus;
 
                        if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                           cpupower_is_cpu_online(cpu))
+                           cpupower_is_cpu_online(cpu) != 1)
                                continue;
 
                        cpus = cpufreq_get_related_cpus(cpu);
@@ -316,10 +316,7 @@ int cmd_freq_set(int argc, char **argv)
             cpu <= bitmask_last(cpus_chosen); cpu++) {
 
                if (!bitmask_isbitset(cpus_chosen, cpu) ||
-                   cpupower_is_cpu_online(cpu))
-                       continue;
-
-               if (cpupower_is_cpu_online(cpu) != 1)
+                   cpupower_is_cpu_online(cpu) != 1)
                        continue;
 
                printf(_("Setting cpu: %d\n"), cpu);
-- 
2.7.4

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