netdev - Re: [RFC PATCH v7 2/8] dpll: Add DPLL framework base functions

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Date: Wed, 3 May 2023 10:09:00 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Vadim Fedorenko <vadfed@...a.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
	Jonathan Lemon <jonathan.lemon@...il.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Milena Olech <milena.olech@...el.com>,
	Michal Michalik <michal.michalik@...el.com>,
	linux-arm-kernel@...ts.infradead.org,
	Vadim Fedorenko <vadim.fedorenko@...ux.dev>, poros@...hat.com,
	mschmidt@...hat.com, netdev@...r.kernel.org,
	linux-clk@...r.kernel.org
Subject: Re: [RFC PATCH v7 2/8] dpll: Add DPLL framework base functions

Fri, Apr 28, 2023 at 02:20:03AM CEST, vadfed@...a.com wrote:
>From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>

[...]


>+static struct dpll_pin *
>+dpll_pin_alloc(u64 clock_id, u8 pin_idx, struct module *module,
>+	       const struct dpll_pin_properties *prop)
>+{
>+	struct dpll_pin *pin;
>+	int ret, fs_size;
>+
>+	pin = kzalloc(sizeof(*pin), GFP_KERNEL);
>+	if (!pin)
>+		return ERR_PTR(-ENOMEM);
>+	pin->pin_idx = pin_idx;
>+	pin->clock_id = clock_id;
>+	pin->module = module;
>+	refcount_set(&pin->refcount, 1);
>+	if (WARN_ON(!prop->label)) {

Why exactly label has to be mandatory? In mlx5, I have no use for it.
Please make it optional. IIRC, I asked for this in the last review
as well.


>+		ret = -EINVAL;
>+		goto err;
>+	}
>+	pin->prop.label = kstrdup(prop->label, GFP_KERNEL);

Labels should be static const string. Do you see a usecase when you need
to dup it? If not, remove this please.



>+	if (!pin->prop.label) {
>+		ret = -ENOMEM;
>+		goto err;
>+	}


[...]