[PATCH v2 1/3] i3c: master: replace ENOTSUPP with SUSV4-compliant EOPNOTSUPP

[Wolfram Sang]

On Fri, Jun 27, 2025 at 04:46:37PM -0400, Frank Li wrote:
> On Fri, Jun 27, 2025 at 01:17:56PM +0200, Wolfram Sang wrote:
> > The checkpatch warning '"ENOTSUPP is not a SUSV4 error code, prefer
> > EOPNOTSUPP"' is correct. We never want this to slip to userspace.
> 
> what's means "We never want this to slip to userspace."?
> 
> especial what's 'this' here?

ENOTSUPP. If we were 100% sure to only use it it kernel space, we could
keep using it. But since this is fragile because we never know about how
error propagation will evolve, we chose to not use it.