Commit 6ba42248 authored by Michael S. Tsirkin's avatar Michael S. Tsirkin Committed by Rusty Russell

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: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
parent 011f0e7a
...@@ -1713,6 +1713,12 @@ static int virtnet_probe(struct virtio_device *vdev) ...@@ -1713,6 +1713,12 @@ static int virtnet_probe(struct virtio_device *vdev)
struct virtnet_info *vi; struct virtnet_info *vi;
u16 max_queue_pairs; 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)) if (!virtnet_validate_features(vdev))
return -EINVAL; return -EINVAL;
......
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