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-rw-r--r--arch/s390/kvm/interrupt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 18932a65ca68..dd0413387a9e 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -956,6 +956,9 @@ static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
set_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs);
spin_unlock(&fi->lock);
+ if (!ext.ext_params)
+ return 0;
+
VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
ext.ext_params);
vcpu->stat.deliver_service_signal++;