Re: [PATCH v2 00/21] DRM: fix struct sg_table nents vs. orig_nents misuse

[Christoph Hellwig]

On Mon, May 04, 2020 at 03:05:30PM +0200, Marek Szyprowski wrote:
> Hi Christoph,
> 
> On 04.05.2020 14:52, Christoph Hellwig wrote:
> > On Mon, May 04, 2020 at 02:50:17PM +0200, Marek Szyprowski wrote:
> >> v2:
> >> - dropped most of the changes to drm/i915
> >> - added fixes for rcar-du, xen, media and ion
> >> - fixed a few issues pointed by kbuild test robot
> >> - added wide cc: list for each patch
> > Didn't you plan to add dma_map_sgbuf and co helper?
> 
> Yes, I have a followup patches for that, but I wanted to fix the 
> existing code in the first step. Then I wanted to send a wrappers and 
> their application. Do you think I should do everything at once, in one 
> patchset?

That would be my preference.  The helpers should be mostly trivial
wrappers, so they can easily backported, and they force passing of the
correct parameters.  So I don't really see a need to fix up all the 20+
places up first just to convert them to the proper API a little later.