Re: [Qemu-devel] [PATCH 1/3] hw/sd/pxa2xx_mmci: convert to SysBusDevice object

[Markus Armbruster]

Peter Maydell <address@hidden> writes:

> On 4 December 2015 at 12:50, Markus Armbruster <address@hidden> wrote:
>> To finally answer your question: the proper owner of the property
>> connecting the backend is the frontend half of the split device.  So, if
>> we have separate device models for controller and the block devices
>> connected to it, the block backend property belongs to the latter, not
>> the former.  If we have separate device models for SD controller and
>> card, the block backend property belongs to the card, not the
>> controller.
>
> I thought this might be your answer, but this is problematic because
> we now have a device in the tree (the sdhci pci card) which has the
> property on the controller, and so that's now user-facing command
> line ABI which we can't change...

As far as I can tell, device sdhci-pci hasn't been in a release, and we
can still keep it out of 2.5:

* Created in commit 224d10f, v2.3.0.

* Made unavailable in commit 1910913, v2.3.0

* Made available in commit 5ec911c, not yet released.

I'll post a patch making it unavailable again right away, to give you
options.