Re: [Qemu-devel] [PATCH 1/2] ide: core: add cleanup function

[John Snow <jsnow@redhat.com>]

On 02/09/2017 02:04 AM, Li Qiang wrote:
> As the pci ahci can be hotplug and unplug, in the ahci unrealize
> function it should free all the resource once allocated in the
> realized function. This patch adds two cleanup function.
> 
> Signed-off-by: Li Qiang <liqiang6-s@360.cn>
> ---
>  hw/ide/core.c             | 21 +++++++++++++++++++++
>  include/hw/ide/internal.h |  2 ++
>  2 files changed, 23 insertions(+)
> 
> diff --git a/hw/ide/core.c b/hw/ide/core.c
> index 43709e5..8fe5896 100644
> --- a/hw/ide/core.c
> +++ b/hw/ide/core.c
> @@ -2586,6 +2586,13 @@ void ide_register_restart_cb(IDEBus *bus)
>      }
>  }
>  
> +void ide_unregister_restart_cb(IDEBus *bus)
> +{
> +    if (bus->dma->ops->restart_dma) {
> +        qemu_del_vm_change_state_handler(bus->vmstate);
> +    }
> +}
> +

Doesn't this conflict with qdev.c's idebus_unrealize call?

>  static IDEDMA ide_dma_nop = {
>      .ops = &ide_dma_nop_ops,
>      .aiocb = NULL,
> @@ -2603,6 +2610,20 @@ void ide_init2(IDEBus *bus, qemu_irq irq)
>      bus->dma = &ide_dma_nop;
>  }
>  
> +void ide_exit(IDEBus *bus)
> +{
> +    int i;
> +
> +    for (i = 0; i < 2; i++) {
> +        IDEState *s = &bus->ifs[i];
> +
> +        timer_del(s->sector_write_timer);
> +        timer_free(s->sector_write_timer);
> +        qemu_vfree(s->smart_selftest_data);
> +        qemu_vfree(s->io_buffer);
> +    }
> +}
> +
>  static const MemoryRegionPortio ide_portio_list[] = {
>      { 0, 8, 1, .read = ide_ioport_read, .write = ide_ioport_write },
>      { 0, 1, 2, .read = ide_data_readw, .write = ide_data_writew },
> diff --git a/include/hw/ide/internal.h b/include/hw/ide/internal.h
> index 88dc118..09b0404 100644
> --- a/include/hw/ide/internal.h
> +++ b/include/hw/ide/internal.h
> @@ -607,8 +607,10 @@ int ide_init_drive(IDEState *s, BlockBackend *blk, IDEDriveKind kind,
>                     uint32_t cylinders, uint32_t heads, uint32_t secs,
>                     int chs_trans);
>  void ide_init2(IDEBus *bus, qemu_irq irq);
> +void ide_exit(IDEBus *bus);
>  void ide_init_ioport(IDEBus *bus, ISADevice *isa, int iobase, int iobase2);
>  void ide_register_restart_cb(IDEBus *bus);
> +void ide_unregister_restart_cb(IDEBus *bus);
>  
>  void ide_exec_cmd(IDEBus *bus, uint32_t val);
>  
>