Re: remove the ->mapping_error method from dma_map_ops V2

[Christoph Hellwig <hch@xxxxxx>]

On Fri, Nov 23, 2018 at 07:55:11AM +0100, Christoph Hellwig wrote:
> On Thu, Nov 22, 2018 at 09:55:25AM -0800, Linus Torvalds wrote:
> > No, the big immediate benefit of allowing "return -EINVAL" etc is
> > simply legibility and error avoidance.
> 
> Well, I can tweak the last patch to return -EINVAL from dma_mapping_error
> instead of the old 1 is as bool true.  The callers should all be fine,
> although I'd have to audit them.  Still wouldn't help with being able to
> return different errors.

Any opinions?  I'd really like to make some forward progress on this
series.