[PATCH -next] iomap: fix inline data on buffered read

[Christoph Hellwig]

On Wed, Mar 19, 2025 at 09:17:30AM +0100, Christoph Hellwig wrote:
> I'd move the iomap_iter_advance into iomap_read_inline_data, just like
> we've pushed it down as far as possible elsewhere, e.g. something like
> the patch below.  Although with that having size and length puzzles
> me a bit, so maybe someone more familar with the code could figure
> out why we need both, how they can be different and either document
> or eliminate that.

... and this doesn't even compile because it breaks write_begin.
So we'll need to keep it in the caller, but maybe without the
goto and just do the plain advance on length?