[PATCH v0 42/42] notifier: Return an error when callback is already registered

[Borislav Petkov]

On Mon, Nov 08, 2021 at 05:12:16PM +0100, Geert Uytterhoeven wrote:
> Returning void is the other extreme ;-)
> 
> There are 3 levels (ignoring BUG_ON()/panic () inside the callee):
>   1. Return void: no one can check success or failure,
>   2. Return an error code: up to the caller to decide,
>   3. Return a __must_check error code: every caller must check.
> 
> I'm in favor of 2, as there are several places where it cannot fail.

Makes sense to me. I'll do that in the next iteration.

Thx.

-- 
Regards/Gruss,
    Boris.

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