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Greg Kurz 6cecf09373 virtio-9p-device: add minimal unrealize handler 
Since commit 4652f1640e "virtio-9p: add savevm
handlers", if the user hot-unplugs a quiescent 9p device and live
migrates, the source QEMU crashes before migration completetion...
This happens because virtio-9p devices have a realize handler which
calls virtio_init() and register_savevm().  Both calls store pointers
to the device internals, that get dereferenced during migration even
if the device got unplugged.

This patch simply adds an unrealize handler to perform minimal
cleanup and avoid the crash.  Hot unplug of non-quiescent 9p devices
is still not supported in QEMU, and not supported by linux guests
either.

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20151208155457.27775.69441.stgit@bahia.huguette.org
[PMM: rewrapped long lines in commit message]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2015-12-10 10:46:22 +00:00
..
9pfs virtio-9p-device: add minimal unrealize handler 2015-12-10 10:46:22 +00:00
acpi Fix memory leak on error 2015-11-26 14:27:52 +02:00
alpha Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
arm xlnx-ep108: Fix minimum RAM check 2015-11-24 14:12:15 +00:00
audio Remove macros IO_READ_PROTO and IO_WRITE_PROTO 2015-10-19 09:03:53 +02:00
block virtio-blk: Drop x-data-plane option 2015-12-07 16:47:16 +00:00
bt bt: avoid unintended sign extension 2015-12-04 09:39:55 +03:00
char input: Convert to new qapi union layout 2015-11-02 08:30:28 +01:00
core q35: Check propery to determine if iommu is set 2015-11-17 15:41:13 +02:00
cpu icc_bus: drop the unused files 2015-10-02 16:22:02 -03:00
cris cris: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
display qxl: Use g_new() & friends where that makes obvious sense 2015-11-06 15:42:38 +03:00
dma hw/dma/pxa2xx: Remove superfluous memset 2015-11-06 15:42:38 +03:00
gpio i.MX: Standardize i.MX GPIO debug 2015-10-27 15:59:46 +00:00
i2c i.MX: Standardize i.MX I2C debug 2015-10-27 15:59:46 +00:00
i386 pc: Don't set hw_version on pc-*-2.5 2015-11-25 13:42:37 +02:00
ide atapi: Fix code indentation 2015-11-24 14:56:49 -05:00
input hw/input/tsc210x: Remove superfluous memset 2015-11-06 15:42:38 +03:00
intc hw/arm_gic: Correctly restore nested irq priority 2015-11-19 12:09:52 +00:00
ipack pci: Trivial device model conversions to realize 2015-02-26 12:42:16 +01:00
isa hw/isa/lpc_ich9: inject the SMI on the VCPU that is writing to APM_CNT 2015-10-22 14:39:09 +03:00
lm32 ui/opengl: Reduce build required libraries for opengl 2015-11-03 10:13:42 +01:00
m68k m68k: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
mem memory: Convert to new qapi union layout 2015-11-02 08:30:28 +01:00
microblaze mb: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
mips gt64xxx: fix decoding of ISD register 2015-12-04 09:39:55 +03:00
misc mac_dbdma: always initialize channel field in DBDMA_channel 2015-11-30 19:38:44 +11:00
moxie moxie: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:43 +02:00
net -----BEGIN PGP SIGNATURE----- 2015-12-07 14:18:31 +00:00
nvram macio-nvram: add to misc category 2015-10-23 12:35:18 +11:00
openrisc * First batch of MAINTAINERS updates 2015-09-25 21:52:30 +01:00
pci fix bad indentation in pcie_cap_slot_write_config() 2015-11-06 15:42:38 +03:00
pci-bridge hw/pci-bridge: format special OFW unit address for PXB host 2015-06-23 22:58:36 +02:00
pci-host i440fx: print an error message if user tries to enable iommu 2015-11-17 15:41:13 +02:00
pcmcia hw: do not pass NULL to memory_region_init from instance_init 2015-10-09 15:25:56 +02:00
ppc spapr_drc: Change value of property "fdt" from null back to {} 2015-12-04 16:50:59 +11:00
s390x virtio: handle non-virtio-1-capable backend for ccw 2015-12-02 19:34:11 +02:00
scsi virtio-scsi: don't crash without a valid device 2015-11-26 16:47:44 +01:00
sd sd: Mark brittle abuse of blk_attach_dev() FIXME 2015-12-07 17:13:10 +00:00
sh4 Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
smbios smbios: add smbios 3.0 support 2015-09-07 10:39:28 +01:00
sparc sparc: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
sparc64 sparc: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
ssi arm: Use g_new() & friends where that makes obvious sense 2015-09-07 10:39:27 +01:00
timer hw/timer/hpet.c: Avoid signed integer overflow which results in bugs on OSX 2015-11-09 15:48:21 +00:00
tpm tpm: avoid clang shifting negative signed warning 2015-11-17 18:35:56 +08:00
tricore tricore: Remove ELF_MACHINE from cpu.h 2015-09-25 12:04:44 +02:00
unicore32 Use DEFINE_MACHINE() to register all machines 2015-09-19 16:40:15 +02:00
usb usb: Use g_new() & friends where that makes obvious sense 2015-11-06 15:42:38 +03:00
vfio vfio: Use g_new() & friends where that makes obvious sense 2015-11-10 12:11:08 -07:00
virtio virtio-pci: Set the QEMU_PCI_CAP_EXPRESS capability early in its DeviceClass realize method 2015-12-02 21:51:33 +02:00
watchdog i6300esb: remove muldiv64() 2015-09-25 14:52:17 +02:00
xen xen: fix invalid assertion 2015-11-06 15:42:38 +03:00
xenpv xen: fix usage of xc_domain_create in domain builder 2015-11-13 17:38:06 +00:00
xtensa target-xtensa: xtfpga: attach FLASH to system IO 2015-10-21 21:28:33 +03:00
Makefile.objs smbios: move smbios code into a common folder 2015-08-13 14:08:30 +03:00