From: Michael S. Tsirkin <mst@redhat.com>
Date: Tue, 13 Jan 2015 14:34:58 +0000 (+0200)
Subject: virtio_pci_modern: support devices with no config
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~45^2~63
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3f5f065603705cd4275d57324c49e391f786b5e;p=pandora-kernel.git

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>
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