virtio_pci_modern: support devices with no config
authorMichael S. Tsirkin <mst@redhat.com>
Tue, 13 Jan 2015 14:34:58 +0000 (16:34 +0200)
committerRusty Russell <rusty@rustcorp.com.au>
Wed, 21 Jan 2015 05:58:55 +0000 (16:28 +1030)
commitd3f5f065603705cd4275d57324c49e391f786b5e
tree8bf7e4230355ec31f9d96d727a4a0b4a42e8acf9
parent3909213cfd9224cb1827d557fb6eb5ebdb8ddcbe
virtio_pci_modern: support devices with no config

Virtio 1.0 spec lists device config as optional.
Set get/set callbacks to NULL. Drivers can check that
and fail gracefully.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
drivers/virtio/virtio_pci_modern.c