diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index b58495fde2e8..c79c1a07f44b 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5383,6 +5383,7 @@ static int svm_update_pi_irte(struct kvm *kvm, unsigned int host_irq,
 			 * - Tell IOMMU to use legacy mode for this interrupt.
 			 * - Retrieve ga_tag of prior interrupt remapping data.
 			 */
+			pi.prev_ga_tag = 0;
 			pi.is_guest_mode = false;
 			ret = irq_set_vcpu_affinity(host_irq, &pi);