linux-kernel - Re: [RFC PATCH v8 03/10] dpll: core: Add DPLL framework base functions

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Date:   Mon, 12 Jun 2023 09:25:06 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Jiri Pirko <jiri@...nulli.us>,
        Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Cc:     kuba@...nel.org, vadfed@...a.com, jonathan.lemon@...il.com,
        corbet@....net, davem@...emloft.net, edumazet@...gle.com,
        vadfed@...com, jesse.brandeburg@...el.com,
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        vadim.fedorenko@...ux.dev
Subject: Re: [RFC PATCH v8 03/10] dpll: core: Add DPLL framework base
 functions

On Sun, 2023-06-11 at 11:36 +0200, Jiri Pirko wrote:
> Fri, Jun 09, 2023 at 02:18:46PM CEST, arkadiusz.kubalewski@...el.com wrote:
> > From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
> 
> [...]
> 
> > +int dpll_device_register(struct dpll_device *dpll, enum dpll_type type,
> > +			 const struct dpll_device_ops *ops, void *priv)
> > +{
> > +	struct dpll_device_registration *reg;
> > +	bool first_registration = false;
> > +
> > +	if (WARN_ON(!ops))
> > +		return -EINVAL;
> > +	if (WARN_ON(type < DPLL_TYPE_PPS || type > DPLL_TYPE_MAX))
> > +		return -EINVAL;
> > +
> > +	mutex_lock(&dpll_lock);
> > +	reg = dpll_device_registration_find(dpll, ops, priv);
> > +	if (reg) {
> > +		mutex_unlock(&dpll_lock);
> > +		return -EEXIST;
> > +	}
> > +
> > +	reg = kzalloc(sizeof(*reg), GFP_KERNEL);
> > +	if (!reg) {
> > +		mutex_unlock(&dpll_lock);
> > +		return -EEXIST;
> > +	}
> > +	reg->ops = ops;
> > +	reg->priv = priv;
> > +	dpll->type = type;
> > +	first_registration = list_empty(&dpll->registration_list);
> > +	list_add_tail(&reg->list, &dpll->registration_list);
> > +	if (!first_registration) {
> > +		mutex_unlock(&dpll_lock);
> > +		return 0;
> > +	}
> > +
> > +	xa_set_mark(&dpll_device_xa, dpll->id, DPLL_REGISTERED);
> > +	mutex_unlock(&dpll_lock);
> > +	dpll_device_create_ntf(dpll);
> 
> This function is introduced in the next patch. Breaks bissection. Make
> sure you can compile the code after every patch applied.

WRT, I think the easiest way to solve the above is adding the function
call in the next patch.

Cheers,

Paolo