On Thu, May 23, 2019 at 01:20:40AM +0000, Ioana Ciornei wrote:
> @@ -111,7 +114,16 @@ static const char *phylink_an_mode_str(unsigned int mode)
>  static int phylink_validate(struct phylink *pl, unsigned long *supported,
>                           struct phylink_link_state *state)
>  {
> -     pl->ops->validate(pl->netdev, supported, state);
> +     struct phylink_notifier_info info = {
> +             .supported = supported,
> +             .state = state,
> +     };
> +
> +     if (pl->ops)
> +             pl->ops->validate(pl->netdev, supported, state);
> +     else
> +             blocking_notifier_call_chain(&pl->notifier_chain,
> +                                          PHYLINK_VALIDATE, &info);

I don't like this use of notifiers for several reasons:

1. It becomes harder to grep for users of this.
2. We lose documentation about what is passed for each method.
3. We lose const-ness for parameters, which then allows users to
   modify phylink-internal data structures inappropriately from
   these notifier calls.

Please find another way.

-- 
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