On Thu, 19 Oct 2023 15:09:58 +0800, Xuan Zhuo <xuanz...@linux.alibaba.com>
wrote:
> Add BUG_ON check to make sure virtqueue_set_dma_premapped() is not
> misused. This function must be called immediately after creating the vq,
> or after vq reset, and before adding any buffers to it.
>
> Signed-off-by: Xuan Zhuo <xuanz...@linux.alibaba.com>
Hi Michael,
Is this in your list?
Thanks
> ---
> drivers/virtio/virtio_ring.c | 5 +----
> 1 file changed, 1 insertion(+), 4 deletions(-)
>
> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
> index 51d8f3299c10..3a3232272067 100644
> --- a/drivers/virtio/virtio_ring.c
> +++ b/drivers/virtio/virtio_ring.c
> @@ -2793,10 +2793,7 @@ int virtqueue_set_dma_premapped(struct virtqueue *_vq)
>
> num = vq->packed_ring ? vq->packed.vring.num : vq->split.vring.num;
>
> - if (num != vq->vq.num_free) {
> - END_USE(vq);
> - return -EINVAL;
> - }
> + BUG_ON(num != vq->vq.num_free);
>
> if (!vq->use_dma_api) {
> END_USE(vq);
> --
> 2.32.0.3.g01195cf9f
>
