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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2010-06-02 11:26:26 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-06-10 20:29:03 +0300 |
| commit | 07dc7263b99e4ddad2b4c69765a428ccb7d48938 (patch) | |
| tree | a1c5cd9a50362b03c60c93f11ed34739d4f9da0f /virt/kvm/ioapic.c | |
| parent | 3499f4d0d1159a21245d6071f8af6a71b86a78bc (diff) | |
| download | lwn-07dc7263b99e4ddad2b4c69765a428ccb7d48938.tar.gz lwn-07dc7263b99e4ddad2b4c69765a428ccb7d48938.zip | |
KVM: read apic->irr with ioapic lock held
Read ioapic->irr inside ioapic->lock protected section.
KVM-Stable-Tag
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt/kvm/ioapic.c')
| -rw-r--r-- | virt/kvm/ioapic.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index 7c79c1d76d0c..3500dee9cf2b 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -192,12 +192,13 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level) { - u32 old_irr = ioapic->irr; + u32 old_irr; u32 mask = 1 << irq; union kvm_ioapic_redirect_entry entry; int ret = 1; spin_lock(&ioapic->lock); + old_irr = ioapic->irr; if (irq >= 0 && irq < IOAPIC_NUM_PINS) { entry = ioapic->redirtbl[irq]; level ^= entry.fields.polarity; |