KVM: x86/pmu: Prevent zero period event from being repeatedly released

[platform/kernel/linux-starfive.git] / arch / x86 / kvm / pmu.h

diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index 85ff3c0..cdb9100 100644 (file)
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -140,7 +140,8 @@ static inline u64 get_sample_period(struct kvm_pmc *pmc, u64 counter_value)
 
 static inline void pmc_update_sample_period(struct kvm_pmc *pmc)
 {
-       if (!pmc->perf_event || pmc->is_paused)
+       if (!pmc->perf_event || pmc->is_paused ||
+           !is_sampling_event(pmc->perf_event))
                return;
 
        perf_event_period(pmc->perf_event,