Re: [PATCH 07/11] transport-pci: Introduce transitional MMR device id

[Parav Pandit <parav@nvidia.com>]

On 4/4/2023 3:28 AM, Michael S. Tsirkin wrote:
> On Fri, Mar 31, 2023 at 01:58:30AM +0300, Parav Pandit wrote:
> > Transitional MMR device PCI Device IDs are unique. Hence,
> > any of the existing drivers do not bind to it.
> > This further maintains the backward compatibility with
> > existing drivers.
> >
> > Co-developed-by: Satananda Burla <sburla@marvell.com>
> > Signed-off-by: Parav Pandit <parav@nvidia.com>
>
> I took a fresh look at it, and I don't get it: what exactly is wrong
> with just using modern ID? Why do we need new ones?

A modern (non transitional device) do not support legacy functionality 
such as virtio net hdr, device reset sequence.