Re: [Qemu-devel] [PATCH] virtio-serial: Cleanup on device hot-unplug

[Anthony Liguori <anthony@codemonkey.ws>]

On 08/18/2010 08:21 PM, Amit Shah wrote:
> Free malloc'ed memory, unregister from savevm and clean up virtio-common
> bits on device hot-unplug.
>
> This was found performing a migration after device hot-unplug.
>
> Reported-by:<lihuang@redhat.com>
> Signed-off-by: Amit Shah<amit.shah@redhat.com>
>    

Applied.  Thanks.

Regards,

Anthony Liguori
> ---
>   hw/virtio-pci.c        |   10 +++++++++-
>   hw/virtio-serial-bus.c |   17 +++++++++++++++++
>   hw/virtio.h            |    1 +
>   3 files changed, 27 insertions(+), 1 deletions(-)
>
> diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
> index 17c3d15..82a6d78 100644
> --- a/hw/virtio-pci.c
> +++ b/hw/virtio-pci.c
> @@ -599,6 +599,14 @@ static int virtio_serial_init_pci(PCIDevice *pci_dev)
>       return 0;
>   }
>
> +static int virtio_serial_exit_pci(PCIDevice *pci_dev)
> +{
> +    VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
> +
> +    virtio_serial_exit(proxy->vdev);
> +    return virtio_exit_pci(pci_dev);
> +}
> +
>   static int virtio_net_init_pci(PCIDevice *pci_dev)
>   {
>       VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
> @@ -689,7 +697,7 @@ static PCIDeviceInfo virtio_info[] = {
>           .qdev.alias = "virtio-serial",
>           .qdev.size = sizeof(VirtIOPCIProxy),
>           .init      = virtio_serial_init_pci,
> -        .exit      = virtio_exit_pci,
> +        .exit      = virtio_serial_exit_pci,
>           .qdev.props = (Property[]) {
>               DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
>                                  DEV_NVECTORS_UNSPECIFIED),
> diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
> index 0586b89..74ba5ec 100644
> --- a/hw/virtio-serial-bus.c
> +++ b/hw/virtio-serial-bus.c
> @@ -41,6 +41,8 @@ struct VirtIOSerial {
>
>       VirtIOSerialBus *bus;
>
> +    DeviceState *qdev;
> +
>       QTAILQ_HEAD(, VirtIOSerialPort) ports;
>
>       /* bitmap for identifying active ports */
> @@ -792,6 +794,8 @@ VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports)
>       vser->vdev.get_config = get_config;
>       vser->vdev.set_config = set_config;
>
> +    vser->qdev = dev;
> +
>       /*
>        * Register for the savevm section with the virtio-console name
>        * to preserve backward compat
> @@ -801,3 +805,16 @@ VirtIODevice *virtio_serial_init(DeviceState *dev, uint32_t max_nr_ports)
>
>       return vdev;
>   }
> +
> +void virtio_serial_exit(VirtIODevice *vdev)
> +{
> +    VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
> +
> +    unregister_savevm(vser->qdev, "virtio-console", vser);
> +
> +    qemu_free(vser->ivqs);
> +    qemu_free(vser->ovqs);
> +    qemu_free(vser->ports_map);
> +
> +    virtio_cleanup(vdev);
> +}
> diff --git a/hw/virtio.h b/hw/virtio.h
> index 30e472a..5836ab6 100644
> --- a/hw/virtio.h
> +++ b/hw/virtio.h
> @@ -195,6 +195,7 @@ VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf);
>
>   void virtio_net_exit(VirtIODevice *vdev);
>   void virtio_blk_exit(VirtIODevice *vdev);
> +void virtio_serial_exit(VirtIODevice *vdev);
>
>   #define DEFINE_VIRTIO_COMMON_FEATURES(_state, _field) \
>   	DEFINE_PROP_BIT("indirect_desc", _state, _field, \
>