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 16:28:48 +1030 |
| commit | 2d9becc1e0c6f86e222e1955e39302d304ad274b (patch) | |
| tree | 00e5dbaa1ce34f85d271dc088262d584178c98b0 | |
| parent | 8cab3cd6ad622f070b18cd1c2e3b97e1d3806629 (diff) | |
virtio/balloon: verify device has config space
Some devices might not implement config space access
(e.g. remoteproc used not to - before 3.9).
virtio/balloon 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>
| -rw-r--r-- | drivers/virtio/virtio_balloon.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 50c5f42d7a9f..3176ea4028a8 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -466,6 +466,12 @@ static int virtballoon_probe(struct virtio_device *vdev) struct virtio_balloon *vb; int err; + if (!vdev->config->get) { + dev_err(&vdev->dev, "%s failure: config access disabled\n", + __func__); + return -EINVAL; + } + vdev->priv = vb = kmalloc(sizeof(*vb), GFP_KERNEL); if (!vb) { err = -ENOMEM; |