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-rw-r--r--arch/x86/kernel/cpu/perf_counter.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 886dcf334bc..5bfd30ab392 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -286,6 +286,9 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
hwc->nmi = 1;
}
+ if (!hwc->irq_period)
+ hwc->irq_period = x86_pmu.max_period;
+
atomic64_set(&hwc->period_left,
min(x86_pmu.max_period, hwc->irq_period));