提交 07dc7263 编写于 作者: M Marcelo Tosatti 提交者: Avi Kivity

KVM: read apic->irr with ioapic lock held

Read ioapic->irr inside ioapic->lock protected section.

KVM-Stable-Tag
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
上级 3499f4d0
......@@ -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;
......
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