Deassign device in kvm_free_assgined_device

In kvm_iommu_unmap_memslots(), assigned_dev_head is already empty.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ce5d1c1..e62a462 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -316,6 +316,7 @@
 #define KVM_ASSIGNED_DEV_HOST_MSI	(1 << 9)
 	unsigned long irq_requested_type;
 	int irq_source_id;
+	int flags;
 	struct pci_dev *dev;
 	struct kvm *kvm;
 };