[PATCH v2 10/15] virtio: add API to enable VQs early

Cornelia Huck
Mon, 06 Oct 2014 15:29:42 -0000

On Mon, 6 Oct 2014 18:11:16 +0300
"Michael S. Tsirkin" <mst at redhat.com> wrote:

> virtio spec 0.9.X requires DRIVER_OK to be set before
> VQs are used, but some drivers use VQs before probe
> function returns.
> Since DRIVER_OK is set after probe, this violates the spec.
>
> Even though under virtio 1.0 transitional devices support this
> behaviour, we want to make it possible for those early callers to become
> spec compliant and eventually support non-transitional devices.
>
> Add API for drivers to call before using VQs.
>
> Sets DRIVER_OK internally.
>
> Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
> ---
>  include/linux/virtio_config.h | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)

Reviewed-by: Cornelia Huck <cornelia.huck at de.ibm.com>