[PATCH 35/48] KVM: Grab pic lock in kvm_pic_clear_isr_ack

[Avi Kivity]

From: Marcelo Tosatti <mtosa...@redhat.com>

isr_ack is protected by kvm_pic->lock.

Signed-off-by: Marcelo Tosatti <mtosa...@redhat.com>
Signed-off-by: Avi Kivity <a...@redhat.com>
---
 arch/x86/kvm/i8259.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 2520922..bf94a45 100644
--- 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);
 }
 
 /*
-- 
1.6.3.3

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