Fix included in qemu-kvm-2.12.0-76.module+el8.1.0+3351+d11c20fa

Tested with qemu-kvm-2.12.0-76.module+el8.1.0+3351+d11c20fa, not hit this issue. So set status to VERIFIED.

Versions:
kernel-4.18.0-100.el8.x86_64
qemu-kvm-2.12.0-76.module+el8.1.0+3351+d11c20fa


1. boot guest with two disks.

   /usr/libexec/qemu-kvm \
        -S \
        -M q35 \
        -smp 12,maxcpus=12,cores=6,threads=1,sockets=2  \
        -cpu 'Opteron_G5',+kvm_pv_unhalt \
        -enable-kvm \
        -m 4G \
        -smp 4 \
        -rtc base=utc,clock=host,driftfix=slew \
        -object iothread,id=iothread0 \
        -device pcie-root-port,id=pcie.0-root-port-2,slot=2,chassis=2,addr=0x2,bus=pcie.0 \
        -device virtio-scsi-pci,id=scsi0,iothread=iothread0,bus=pcie.0-root-port-2,addr=0x0 \
        -blockdev driver=file,cache.direct=on,cache.no-flush=off,filename=/home/kvm_autotest_root/images/win10-64-virtio-scsi.qcow2,node-name=win_disk \
        -blockdev driver=qcow2,node-name=drive_win,file=win_disk \
        -device scsi-hd,drive=drive_win,id=win1,write-cache=on \
        -blockdev driver=file,cache.direct=on,cache.no-flush=off,filename=/home/kvm_autotest_root/images/data.qcow2,node-name=data_disk1 \
        -blockdev driver=qcow2,node-name=drive_stg1,file=data_disk1 \
        -device scsi-hd,drive=drive_stg1,id=data1,write-cache=on \
        -device pcie-root-port,id=pcie.0-root-port-3,slot=3,chassis=3,addr=0x3,bus=pcie.0 \
        -device virtio-net-pci,mac=6c:ae:8b:20:80:59,id=netdev1,vectors=4,netdev=net1,bus=pcie.0-root-port-3,addr=0x0 \
        -netdev tap,id=net1,vhost=on \
        -qmp tcp:0:4446,server,nowait \
        -vga qxl \
        -vnc :0 \
        -monitor stdio \
        -boot menu=on \

2. Unplug the data disk:

# telnet localhost 4446
Trying ::1...
telnet: connect to address ::1: Connection refused
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
{"QMP": {"version": {"qemu": {"micro": 0, "minor": 12, "major": 2}, "package": "qemu-kvm-2.12.0-76.module+el8.1.0+3351+d11c20fa"}, "capabilities": []}}


{"execute":"qmp_capabilities"}
{"return": {}}


{"execute":"device_del","arguments":{"id":"data1"}}

{"timestamp": {"seconds": 1560411316, "microseconds": 320066}, "event": "DEVICE_DELETED", "data": {"device": "data1", "path": "/machine/peripheral/data1"}}
{"return": {}}


3. Hotplug the deleted disk:

{ 'execute':'device_add','arguments':{'driver':'scsi-hd','drive':'drive_stg1','id':'data1'}}
{"return": {}}


4.  I/O test on data disk.

Not hit any error.

5. reboot and shutdown guest.

(qemu) system_reset      
(qemu) system_powerdown

qmp monitor output:
{"timestamp": {"seconds": 1560411417, "microseconds": 966794}, "event": "RESET", "data": {"guest": false}}
{"timestamp": {"seconds": 1560411418, "microseconds": 52508}, "event": "RESET", "data": {"guest": true}}
{"timestamp": {"seconds": 1560411580, "microseconds": 409151}, "event": "POWERDOWN"}
{"timestamp": {"seconds": 1560411626, "microseconds": 126732}, "event": "SHUTDOWN", "data": {"guest": true}}

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3345