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

Message ID 1250415008-17175-36-git-send-email-avi@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Avi Kivity Aug. 16, 2009, 9:29 a.m. UTC 
From: Marcelo Tosatti <mtosatti@redhat.com>

isr_ack is protected by kvm_pic->lock.

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

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);
 }
 
 /*