[patch 1/4] KVM: x86: grab pic lock in kvm_pic_clear_isr_ack

[Marcelo Tosatti <mtosatti@redhat.com>]

[-- Attachment #1: pic-clear-isr-lock --]
[-- Type: text/plain, Size: 515 bytes --]

isr_ack is protected by kvm_pic->lock.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

Index: kvm/arch/x86/kvm/i8259.c
===================================================================
--- kvm.orig/arch/x86/kvm/i8259.c
+++ kvm/arch/x86/kvm/i8259.c
@@ -72,8 +72,10 @@ static void pic_clear_isr(struct kvm_kpi
 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);
 }
 
 /*

-- 

--