[PATCH 5.4 034/222] cpuidle: teo: Fix intervals[] array indexing bug

Greg Kroah-Hartman
2020-01-22T13:19:32Z

From: Ikjoon Jang <ikjn@chromium.org>

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>

---
drivers/cpuidle/governors/teo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/cpuidle/governors/teo.c
+++ b/drivers/cpuidle/governors/teo.c
@@ -194,7 +194,7 @@ static void teo_update(struct cpuidle_dr
* 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;
}