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| author | James Bottomley <JBottomley@Parallels.com> | 2013-06-26 23:08:22 -0700 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2013-06-26 23:08:22 -0700 |
| commit | a9e94ec3504ead4b87a929bc57f5aa99a6590437 (patch) | |
| tree | b6e7aaec0e844dc066e93296a85e5769542ef525 /arch/x86/kvm/lapic.c | |
| parent | 36a279686bc02d340eb213a9f2a0b67e50de64b4 (diff) | |
| parent | 2884d4230867c8a46cf701214051e923301e7429 (diff) | |
Merge tag 'fcoe1' into fixes
This patch fixes a critical bug that was introduced in 3.9
related to VLAN tagging FCoE frames.
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index e1adbb4aca7..0eee2c8b64d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1861,11 +1861,14 @@ void kvm_apic_accept_events(struct kvm_vcpu *vcpu) { struct kvm_lapic *apic = vcpu->arch.apic; unsigned int sipi_vector; + unsigned long pe; - if (!kvm_vcpu_has_lapic(vcpu)) + if (!kvm_vcpu_has_lapic(vcpu) || !apic->pending_events) return; - if (test_and_clear_bit(KVM_APIC_INIT, &apic->pending_events)) { + pe = xchg(&apic->pending_events, 0); + + if (test_bit(KVM_APIC_INIT, &pe)) { kvm_lapic_reset(vcpu); kvm_vcpu_reset(vcpu); if (kvm_vcpu_is_bsp(apic->vcpu)) @@ -1873,7 +1876,7 @@ void kvm_apic_accept_events(struct kvm_vcpu *vcpu) else vcpu->arch.mp_state = KVM_MP_STATE_INIT_RECEIVED; } - if (test_and_clear_bit(KVM_APIC_SIPI, &apic->pending_events) && + if (test_bit(KVM_APIC_SIPI, &pe) && vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED) { /* evaluate pending_events before reading the vector */ smp_rmb(); |