Commit 6ba42248 authored Jan 12, 2015 by Michael S. Tsirkin Committed by Rusty Russell Jan 21, 2015

virtio/net: verify device has config space



Some devices might not implement config space access
(e.g. remoteproc used not to - before 3.9).
virtio/net needs config space access so make it
fail gracefully if not there.

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

parent 011f0e7a

drivers/net/virtio_net.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1713,6 +1713,12 @@ static int virtnet_probe(struct virtio_device *vdev)
		struct virtnet_info *vi;
		u16 max_queue_pairs;

		if (!vdev->config->get) {
		dev_err(&vdev->dev, "%s failure: config access disabled\n",
		__func__);
		return -EINVAL;
		}

		if (!virtnet_validate_features(vdev))
		return -EINVAL;