When trying to drain a node, a Live Migration of a VM gets stuck in a loop and fails due to: 

reason:Live migration failed error encountered during preparing domain for migration: failed to detach hostdev <hostdev type="pci" managed="no" mode="subsystem"><source><address type="" domain="0x0000" bus="0xd8" slot="0x0a" function="0x7"></address></source><address type="pci" domain="0x0000" bus="0x20" slot="0x00" function="0x0"></address><alias name="ua-sriov-nic-2"></alias></hostdev>, err: virError(Code=1, Domain=10, Message='internal error: unable to execute QEMU command 'device_del': Device ua-sriov-nic-2 is already in the process of unplug')

VM has 11 sriov devices: 

       interfaces:
          - bridge: {}
            macAddress: '52:54:00:02:01:00'
            model: virtio
            name: nic-1
          - macAddress: '52:54:00:02:01:01'
            model: virtio
            name: nic-2
            pciAddress: '0000:20:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:02'
            model: virtio
            name: nic-3
            pciAddress: '0000:21:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:03'
            model: virtio
            name: nic-4
            pciAddress: '0000:22:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:04'
            model: virtio
            name: nic-5
            pciAddress: '0000:23:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:05'
            model: virtio
            name: nic-6
            pciAddress: '0000:24:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:06'
            model: virtio
            name: nic-7
            pciAddress: '0000:25:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:07'
            model: virtio
            name: nic-8
            pciAddress: '0000:26:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:08'
            model: virtio
            name: nic-9
            pciAddress: '0000:27:00.0'
            sriov: {}
          - macAddress: '52:54:00:02:01:09'
            model: virtio
            name: nic-10
            pciAddress: '0000:28:00.0'
            sriov: {}
          - macAddress: 52:54:00:02:01:0a
            model: virtio
            name: nic-11
            pciAddress: '0000:29:00.0'
            sriov: {}

OCP 4.12.30
OCV 4.12.7 

Happened on one VM out of many.  Unclear if it's reproducible. 

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Successful Migration