X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=kernel%2Fperf_event.c;h=7e32b51ff043b9a7fb47ef17aed2aef295d3de66;hb=4cb6948e5365ab874bb71ac35fb6b7c6dd305765;hp=109c5ec88933aabf389da35cf544943cfbea685f;hpb=89275d59b572b92b1e2f6ddb63c49deecb801ff9;p=karo-tx-linux.git

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 109c5ec88933..7e32b51ff043 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1507,6 +1507,9 @@ do {					\
 		divisor = nsec * frequency;
 	}
 
+	if (!divisor)
+		return dividend;
+
 	return div64_u64(dividend, divisor);
 }
 
@@ -1529,7 +1532,7 @@ static int perf_event_start(struct perf_event *event)
 static void perf_adjust_period(struct perf_event *event, u64 nsec, u64 count)
 {
 	struct hw_perf_event *hwc = &event->hw;
-	u64 period, sample_period;
+	s64 period, sample_period;
 	s64 delta;
 
 	period = perf_calculate_period(event, nsec, count);