Re: [Qemu-devel] [PATCH v4 14/17] ahci: Migrate IDEStatus

[Amit Shah <amit.shah@redhat.com>]

On (Mon) 23 Feb 2015 [11:18:03], John Snow wrote:
> Amazingly, we weren't doing this before.
> 
> Make sure we migrate the IDEState structure that belongs to
> the AHCIDevice.IDEBus structure during migrations.
> 
> No version numbering changes because AHCI is not officially
> migratable (and we can all see with good reason why) so we
> do not impact any official builds by altering the stream and
> leaving it at version 1.
> 
> This fixes the rerror=stop/werror=stop test case where we wish
> to migrate a halted job. Previously, the error code would not
> migrate, so even if the job completed successfully, AHCI would
> report an error because it would still have the placeholder
> error code from initialization time.
> 
> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
> Signed-off-by: John Snow <jsnow@redhat.com>
> ---
>  hw/ide/ahci.c     | 1 +
>  hw/ide/internal.h | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/hw/ide/ahci.c b/hw/ide/ahci.c
> index bc6d5ce..3f4fc77 100644
> --- a/hw/ide/ahci.c
> +++ b/hw/ide/ahci.c
> @@ -1321,6 +1321,7 @@ static const VMStateDescription vmstate_ahci_device = {
>      .version_id = 1,
>      .fields = (VMStateField[]) {
>          VMSTATE_IDE_BUS(port, AHCIDevice),
> +        VMSTATE_IDE_DRIVE(port.ifs[0], AHCIDevice),

This adds a new field to the struct without bumping up the version
number.

Flagged by the static checker.


		Amit