Re: [PATCH v2] pch_uart: Fix dma_sync_sg_for_device() nents value

[Jiri Slaby]

On 30. 06. 25, 15:13, Andy Shevchenko wrote:
> On Mon, Jun 30, 2025 at 03:01:01PM +0200, Jiri Slaby wrote:
> > On 30. 06. 25, 14:10, Thomas Fourier wrote:
> > > The dma_sync_sg_for_device() functions should be called with the same
> > > nents as the dma_map_sg(), not the value the map function returned.
> >
> > Care to explain why do you intend to sync more than mapped? "should be
> > called" is way to vague.
>
> It's documented as the correct use of the DMA streaming API.
> Should we go deeper and understand why?

That's IMO enough if he put/referenced this in the commit log...

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js
suse labs