cpupower: Do not show an empty Idle_Stats monitor if no idle driver is available
Thomas Renninger [Thu, 11 Aug 2011 23:11:36 +0000 (01:11 +0200)]
By taking error values of:
sysfs_get_idlestate_count(..);
into account.

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

tools/power/cpupower/utils/idle_monitor/cpuidle_sysfs.c

index d048b96..bcd22a1 100644 (file)
@@ -134,7 +134,7 @@ static struct cpuidle_monitor *cpuidle_register(void)
        /* Assume idle state count is the same for all CPUs */
        cpuidle_sysfs_monitor.hw_states_num = sysfs_get_idlestate_count(0);
 
-       if (cpuidle_sysfs_monitor.hw_states_num == 0)
+       if (cpuidle_sysfs_monitor.hw_states_num <= 0)
                return NULL;
 
        for (num = 0; num < cpuidle_sysfs_monitor.hw_states_num; num++) {