[PATCH] drm/prime: fix extracting of the DMA addresses from a scatterlist

[Shane Francis]

Hello Marek,

On Fri, Mar 27, 2020 at 9:00 AM Marek Szyprowski
<m.szyprowski at samsung.com> wrote:
> > I have tested the above patch against my original issues with amdgpu
> > and radeon drivers and everything is still working as expected.
> >
> > Sorry I missed this in my original patches.
>
> No problem. Thanks for testing!
>
> Best regards
> --
> Marek Szyprowski, PhD
> Samsung R&D Institute Poland
>
Just a thought.

Would it be worth adding some comments to the code to explain why this
is needed, reading
the thread around my original patches and the DMA-API documentation it
is not instantly
clear why you would be mapping the pages in this way.

Would probably prevent someone in the future making the same mistake I
did while updating
this code.

Regards,

Shane Francis