Description of problem:
console ports still in guest after  hot unplug  virtio-serial-pci or virtconsole

Version-Release number of selected component (if applicable):
Host kernel:
#uname -r
2.6.32-118.el6.x86_64
Qemu-kvm version
#qemu-kvm-0.12.1.2-2.149.el6.x86_64
Guest kernel:
#uname -r
2.6.32-118.el6.x86_64

How reproducible:
2/2

Steps to Reproduce:
1.Boot guest with two console ports
#/usr/libexec/qemu-kvm -m 2G -smp 4 -drive file=/root/zhangjunyi/rhel6.1-ide.qcow2,if=none,id=test,cache=none,format=qcow2,werror=stop,rerror=stop -device virtio-blk-pci,drive=test -cpu qemu64,+sse2,+x2apic -boot c -netdev tap,id=hostnet0,vhost=on -device virtio-net-pci,netdev=hostnet0,id=net0,mac=22:11:22:45:66:95 -vnc :11 

/-device virtio-serial-pci,id=ser0,max_ports=2 
-chardev socket,path=/tmp/foo,server,nowait,id=foo 
-chardev socket,path=/tmp/bar,server,nowait,id=bar 
-device virtconsole,bus=ser0.0,chardev=foo,name=org.fedoraproject.console.foo,id=zhang1 -device virtconsole,bus=ser0.0,chardev=bar,name=org.fedoraproject.console.bar,id=zhang2
-qmp tcp:0:4444,server,nowait -monitor stdio
2.In guest,check console ports number
hvc0  hvc1  hvc2  hvc3  hvc4  hvc5  hvc6  hvc7
3.hot remove virtio-serial-pci
#{"execute":"device_del","arguments":{"id":"ser0"}}
4.I check in qemu,in qemu console,virtio-serial-pci was hot removed.
(qemu)info qtree
5.in guest,console ports still here.
hvc0  hvc1  hvc2  hvc3  hvc4  hvc5  hvc6  hvc7  

Actual results:
in guest,console ports still here.
Expected results:
console should be removed.


Additional info:
After hot remove virtio-serial-pci,if i reboot guest,console ports spawn on this virtio-serial-pci were gone.