forked from Minki/linux
virtio: don't require a config space on the console device.
Strictly, it's only needed when we have features (size or multiport). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -1986,7 +1986,10 @@ static int virtcons_probe(struct virtio_device *vdev)
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bool multiport;
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bool early = early_put_chars != NULL;
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if (!vdev->config->get) {
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/* We only need a config space if features are offered */
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if (!vdev->config->get &&
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(virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)
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|| virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT))) {
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dev_err(&vdev->dev, "%s failure: config access disabled\n",
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__func__);
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return -EINVAL;
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