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KVM: PIT: control word is write-only
[linux-2.6-block.git]
/
arch
/
x86
/
kvm
/
i8254.c
diff --git
a/arch/x86/kvm/i8254.c
b/arch/x86/kvm/i8254.c
index 296aba49472ae3cdcf7580bc79d60d83ed48ce3e..15578f180e596bee481f10451ec375b6ceb37f26 100644
(file)
--- a/
arch/x86/kvm/i8254.c
+++ b/
arch/x86/kvm/i8254.c
@@
-467,6
+467,9
@@
static int pit_ioport_read(struct kvm_io_device *this,
return -EOPNOTSUPP;
addr &= KVM_PIT_CHANNEL_MASK;
+ if (addr == 3)
+ return 0;
+
s = &pit_state->channels[addr];
mutex_lock(&pit_state->lock);