tools / cpupower: Fix no idle state information return value

sysfs_get_idlestate_count() returns an unsigned int.  Returning -ENODEV
is not the right thing to do here, and in any case is handled the same
way as if there are no states found.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/tools/power/cpupower/utils/helpers/sysfs.c b/tools/power/cpupower/utils/helpers/sysfs.c
index 09afe5d..4e8fe2c 100644 (file)
--- a/tools/power/cpupower/utils/helpers/sysfs.c
+++ b/tools/power/cpupower/utils/helpers/sysfs.c
@@ -361,7 +361,7 @@ unsigned int sysfs_get_idlestate_count(unsigned int cpu)
 
        snprintf(file, SYSFS_PATH_MAX, PATH_TO_CPU "cpuidle");
        if (stat(file, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode))
-               return -ENODEV;
+               return 0;
 
        snprintf(file, SYSFS_PATH_MAX, PATH_TO_CPU "cpu%u/cpuidle/state0", cpu);
        if (stat(file, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode))