Re: Kernel warning at drivers/infiniband/core/rw.c:349

[Bart Van Assche <bvanassche@xxxxxxx>]

On 10/13/21 9:15 AM, Logan Gunthorpe wrote:
> diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
> index 4b50d9a3018a..4ba642fc8a19 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -4097,8 +4097,13 @@ static inline int ib_dma_map_sgtable_attrs(struct ib_dev>
>                                             enum dma_data_direction direction,
>                                             unsigned long dma_attrs)
>   {
> +       int nents;
> +
>          if (ib_uses_virt_dma(dev)) {
> -               ib_dma_virt_map_sg(dev, sgt->sgl, sgt->orig_nents);
> +               nents = ib_dma_virt_map_sg(dev, sgt->sgl, sgt->orig_nents);
> +               if (!nents)
> +                       return -EIO;
> +               sgt->nents = nents;
>                  return 0;
>          }
>          return dma_map_sgtable(dev->dma_device, sgt, direction, dma_attrs);

Thanks!

Tested-by: Bart Van Assche <bvanassche@xxxxxxx>