Re: [Qemu-devel] Hot unplug of pci-serial-2x fails assertion

[Peter Crosthwaite]

On Mon, Jul 14, 2014 at 9:10 PM, Markus Armbruster <address@hidden> wrote:
> Watch this:
>
>     (qemu) chardev-add file,path=foo2,id=foo2
>     (qemu) chardev-add file,path=foo3,id=foo3
>     (qemu) device_add id=gg,driver=pci-serial-2x,chardev1=foo2,chardev2=foo3
>     (qemu) device_del gg
>     (qemu) upstream-qemu: /work/armbru/qemu/memory.c:1259: 
> memory_region_finalize: Assertion `((&mr->subregions)->tqh_first == ((void 
> *)0))' failed.
>

Are there more specifics to reproduction? I'm struggling and I've
tried a few variants.

Curiously I can device_del gg repeatedly with seemingly no effect however:

address@hidden:~/qemu$ ./x86_64-softmmu/qemu-system-x86_64  -nographic
QEMU 2.0.91 monitor - type 'help' for more information
(qemu)  chardev-add file,path=foo2,id=foo2
(qemu)  chardev-add file,path=foo3,id=foo3
(qemu) device_add id=gg,driver=pci-serial-2x,chardev1=foo2,chardev2=foo3
(qemu) device_del gg
(qemu) device_del gg
(qemu) device_del gg
(qemu) info qtree
bus: main-system-bus
  type System
  dev: hpet, id ""
    gpio-in "" 2
    gpio-out "" 1
    timers = 3 (0x3)
    msi = false
    hpet-intcap = 4 (0x4)
    irq 32
    mmio 00000000fed00000/0000000000000400
  dev: ioapic, id ""
    gpio-in "" 24
    irq 0
    mmio 00000000fec00000/0000000000001000
  dev: i440FX-pcihost, id ""
    pci-hole64-size = 18446744073709551615 (16 EiB)
    short_root_bus = 0 (0x0)
    irq 0
    bus: pci.0
      type PCI
      dev: pci-serial-2x, id "gg"
        chardev1 = "foo2"
        chardev2 = "foo3"
        prog_if = 2 (0x2)
        addr = 04.0
        romfile = ""
        rombar = 1 (0x1)
        multifunction = false
        command_serr_enable = true
        class Serial port, addr 00:04.0, pci id 1b36:0003 (sub 1af4:1100)
        bar 0: i/o at 0xffffffffffffffff [0xe]

Am I missing something?

Regards,
Peter