[Xen-bugs] [Bug 1503] New: [vt-d]the assigned USB device does not work when hot-plug the real device

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1503

           Summary: [vt-d]the assigned USB device does not work when hot-
                    plug the real device
           Product: Xen
           Version: unstable
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Guest-OS
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: jiajun.xu@xxxxxxxxx


Environment:
------------
Service Arch (ia32/ia32e/IA64): ia32e
Guest OS Type (Linux/Windows): Linux
Change Set: 20033(pcops dom0)
Hardware: NHM-HEDT


Bug detailed description:
--------------------------
We assigned 00:1a.0 or 00:1a.2 USB keyboard/mouse/disk device to guest, then
remove the real hard device and plug it in. The device does not work in guest,
but "lspci" still can see the device. We have to using "xm pci-detach" and "xm
pci-attach" command to enable it rework on guest.

00:1a.1 and 00:1d.2 has no this issue.


Reproduce steps:
----------------
1. assign 00:1a.0 or 00:1a.2 USB keyboard/mouse/disk to guest
2. remove the real USB device and plug in
3. device on guest can not work

Workaround method:
4. using "xm pci-detach" and "xm pci-attach" command to enable it rework on
guest


USB lspci info:
[root@vt-nhm1 ~]# lspci | grep USB
00:1a.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #4
00:1a.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #5
00:1a.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #6
00:1a.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI
Controller #2
00:1d.0 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #1
00:1d.1 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #2
00:1d.2 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB UHCI
Controller #3
00:1d.7 USB Controller: Intel Corporation 82801JI (ICH10 Family) USB2 EHCI
Controller #1


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