Re: [PATCH 1/4] regmap: sdw: move to -EOPNOTSUPP

[Mark Brown]

On Wed, Aug 26, 2020 at 12:09:28PM +0200, Takashi Iwai wrote:
> Mark Brown wrote:

> > checkpatch is broken.

> Heh, I'm not objecting it :)

> OTOH, it's also true that ENOTSUPP is no good error code if returned
> to user-space.  Unfortunately many codes (including what I wrote) use
> this code mistakenly, and they can't be changed any longer...

It's also used internally in various places without being returned to
userspace, that's what's going on here - the regmap core has some
specific checks for -ENOTSUPP.

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