cpuidle: teo: Fix intervals[] array indexing bug

commit 57388a2ccb6c2f554fee39772886c69b796dde53 upstream.

Fix a simple bug in rotating array index.

Fixes: b26bf6ab716f ("cpuidle: New timer events oriented governor for tickless systems")
Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Cc: 5.1+ <stable@vger.kernel.org> # 5.1+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/cpuidle/governors/teo.c b/drivers/cpuidle/governors/teo.c
index b9b9156..7030474 100644 (file)
--- a/drivers/cpuidle/governors/teo.c
+++ b/drivers/cpuidle/governors/teo.c
@@ -194,7 +194,7 @@ static void teo_update(struct cpuidle_driver *drv, struct cpuidle_device *dev)
         * pattern detection.
         */
        cpu_data->intervals[cpu_data->interval_idx++] = measured_us;
-       if (cpu_data->interval_idx > INTERVALS)
+       if (cpu_data->interval_idx >= INTERVALS)
                cpu_data->interval_idx = 0;
 }