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authorAvi Kivity <avi@qumranet.com>2008-08-17 09:03:46 -0400
committerAvi Kivity <avi@qumranet.com>2008-10-15 04:15:19 -0400
commitdc7404cea34ef997dfe89ca94d16358e9d29c8d8 (patch)
treef62ea13dc8a824f40543c4d690fbe1f3238a3084 /arch/x86/kvm/i8254.c
parent85428ac7c39ab5fff23b5d14ccb32941e9401285 (diff)
KVM: Handle spurious acks for PIT interrupts
Spurious acks can be generated, for example if the PIC is being reset. Handle those acks gracefully rather than flooding the log with warnings. Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/i8254.c')
-rw-r--r--arch/x86/kvm/i8254.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 7d04dd3ef857..c842060c6c04 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -228,7 +228,7 @@ void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
228 irq_ack_notifier); 228 irq_ack_notifier);
229 spin_lock(&ps->inject_lock); 229 spin_lock(&ps->inject_lock);
230 if (atomic_dec_return(&ps->pit_timer.pending) < 0) 230 if (atomic_dec_return(&ps->pit_timer.pending) < 0)
231 WARN_ON(1); 231 atomic_inc(&ps->pit_timer.pending);
232 ps->irq_ack = 1; 232 ps->irq_ack = 1;
233 spin_unlock(&ps->inject_lock); 233 spin_unlock(&ps->inject_lock);
234} 234}