KVM: Grab pic lock in kvm_pic_clear_isr_ack

[safe/jmp/linux-2.6] / arch / x86 / kvm / i8259.c

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 2520922..bf94a45 100644 (file)
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -72,8 +72,10 @@ static void pic_clear_isr(struct kvm_kpic_state *s, int irq)
 void kvm_pic_clear_isr_ack(struct kvm *kvm)
 {
        struct kvm_pic *s = pic_irqchip(kvm);
+       pic_lock(s);
        s->pics[0].isr_ack = 0xff;
        s->pics[1].isr_ack = 0xff;
+       pic_unlock(s);
 }
 
 /*