On Thu, Jan 15, 2015 at 08:13:44PM +0200, Michael S. Tsirkin wrote:
> Spec says devices must set VIRTIO_1 feature bit.
> Fail gracefully if they don't.
>
> Signed-off-by: Michael S. Tsirkin <[email protected]>
Oops, this is not needed: we already have this in finalize_features
if (!__virtio_test_bit(vdev, VIRTIO_F_VERSION_1)) {
dev_err(&vdev->dev, "virtio: device uses modern interface "
"but does not have VIRTIO_F_VERSION_1\n");
return -EINVAL;
}
Pls disregard this patch.
> ---
> drivers/virtio/virtio_pci_modern.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/virtio/virtio_pci_modern.c
> b/drivers/virtio/virtio_pci_modern.c
> index 17f0228..a8fd267 100644
> --- a/drivers/virtio/virtio_pci_modern.c
> +++ b/drivers/virtio/virtio_pci_modern.c
> @@ -570,6 +570,7 @@ int virtio_pci_modern_probe(struct virtio_pci_device
> *vp_dev)
> int err, common, isr, notify, device;
> u32 notify_length;
> u32 notify_offset;
> + u64 features;
>
> check_offsets();
>
> @@ -676,12 +677,19 @@ int virtio_pci_modern_probe(struct virtio_pci_device
> *vp_dev)
> vp_dev->vdev.config = &virtio_pci_config_nodev_ops;
> }
>
> + features = vp_get_features(vdev);
> + if (!features & (1ULL << VIRTIO_F_VERSION_1))
> + goto err_valid_features;
> +
> vp_dev->config_vector = vp_config_vector;
> vp_dev->setup_vq = setup_vq;
> vp_dev->del_vq = del_vq;
>
> return 0;
>
> +err_valid_features:
> + if (vp_dev->device)
> + pci_iounmap(pci_dev, vp_dev->device);
> err_map_device:
> if (vp_dev->notify_base)
> pci_iounmap(pci_dev, vp_dev->notify_base);
> --
> MST
--
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