[PATCH] libata: don't initialize sg in ata_exec_internal() if DMA_NONE

[Arnd Bergmann]

On Monday 11 December 2006 15:02, Tejun Heo wrote:
>  {
>         struct scatterlist sg;
> +       unsigned int n_elem = 0;
>  
> -       sg_init_one(&sg, buf, buflen);
> +       if (dma_dir != DMA_NONE) {
> +               WARN_ON(!buf);
> +               sg_init_one(&sg, buf, buflen);
> +               n_elem++;
> +       }
>  
Ok, looks good as well. I still think we should have the WARN_ON()
in sg_set_buf(), but I can send a separate patch for that to linux-mm.

	Arnd <><