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

[John Snow <jsnow@redhat.com>]

On 02/09/2017 08:22 PM, Li Qiang wrote:
> Hello John,
> 
> 2017-02-10 3:42 GMT+08:00 John Snow <jsnow@redhat.com
> <mailto: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 <mailto: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? 
> 
> 
> As far as I can see, No conflict. Let's get a confirmation.
> 
> Hello Paolo,
> 
> Does this patch have any conflict/affect with the qdev?
> 
> Thanks.
> 

They're both deleting the same VMstate handler, so as far as I can see
this is a redundant 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);
>     >
>     >
>