diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2015-01-12 16:23:37 +0200 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2015-01-21 16:28:47 +1030 |
| commit | 6ba422489bcaebd89142cc0aeae9095d03c8301a (patch) | |
| tree | e6759be166eb1489f5efe7bf7c8e3ab993a841a4 /drivers/net/virtio_net.c | |
| parent | 011f0e7a6944855436fb29c7a7e6c3c89c95f8fb (diff) | |
| download | lwn-6ba422489bcaebd89142cc0aeae9095d03c8301a.tar.gz lwn-6ba422489bcaebd89142cc0aeae9095d03c8301a.zip | |
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>
Diffstat (limited to 'drivers/net/virtio_net.c')
| -rw-r--r-- | drivers/net/virtio_net.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 5ca97713bfb3..9bc107200709 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -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; |