[alsa-devel] [PATCH] ASoC: core - make IO calls return a valid errno on failure.

[Mark Brown]

On Tue, Jul 26, 2011 at 12:18:19PM +0100, Liam Girdwood wrote:
> On Mon, 2011-07-25 at 23:22 +0200, Mark Brown wrote:

> > Yeah, it really should but it's kind of tricky for the reads as we're
> > returning errors in band and we could have 32 bit registers (I'm
> > guessing the platform versions already do) so we lose.  :/  Not sure
> > what the best thing to do there is, changing to return the errors out of
> > band for reads is more painful than I care to contemplate.

> Oh, I agree it would be painful for a rework here. But why did you
> suggest this sort of update in a previous patch comment ? (Unless I
> misunderstood).

Dunno the specific posting but there's two things I can think of:

- This isn't an issue for writes so they can and should pass back error
  codes, it's only reads that have trouble.

- If I see people converting an error code into -EINVAL or something I
  tend to complain about that.