diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6b76486702de..8213f7fb71a7 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8068,6 +8068,9 @@ restart:
 			writeback = false;
 		r = 0;
 		vcpu->arch.complete_userspace_io = complete_emulated_mmio;
+	} else if (vcpu->arch.complete_userspace_io) {
+		writeback = false;
+		r = 0;
 	} else if (r == EMULATION_RESTART)
 		goto restart;
 	else