diff options
Diffstat (limited to 'drivers/char/virtio_console.c')
| -rw-r--r-- | drivers/char/virtio_console.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index de03df9dd7c9..fae2dbbf5745 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -1986,6 +1986,15 @@ static int virtcons_probe(struct virtio_device *vdev) bool multiport; bool early = early_put_chars != NULL; + /* We only need a config space if features are offered */ + if (!vdev->config->get && + (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE) + || virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT))) { + dev_err(&vdev->dev, "%s failure: config access disabled\n", + __func__); + return -EINVAL; + } + /* Ensure to read early_put_chars now */ barrier(); |