linux-kernel - Re: [PATCH v7 4/7] can: Add Nuvoton NCT6694 CANFD support

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Message-ID: <c714463f-e027-470d-82d8-3905f5107d6c@wanadoo.fr>
Date: Fri, 7 Feb 2025 20:17:52 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: Ming Yu <a0282524688@...il.com>, tmyu0@...oton.com, lee@...nel.org,
 linus.walleij@...aro.org, brgl@...ev.pl, andi.shyti@...nel.org,
 mkl@...gutronix.de, mailhol.vincent@...adoo.fr, andrew+netdev@...n.ch,
 davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
 pabeni@...hat.com, wim@...ux-watchdog.org, linux@...ck-us.net,
 jdelvare@...e.com, alexandre.belloni@...tlin.com
Cc: linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
 linux-i2c@...r.kernel.org, linux-can@...r.kernel.org,
 netdev@...r.kernel.org, linux-watchdog@...r.kernel.org,
 linux-hwmon@...r.kernel.org, linux-rtc@...r.kernel.org,
 linux-usb@...r.kernel.org
Subject: Re: [PATCH v7 4/7] can: Add Nuvoton NCT6694 CANFD support

Le 07/02/2025 à 08:44, Ming Yu a écrit :
> This driver supports Socket CANFD functionality for NCT6694 MFD
> device based on USB interface.

...

> +static int nct6694_can_start(struct net_device *ndev)
> +{
> +	struct nct6694_can_priv *priv = netdev_priv(ndev);
> +	struct nct6694_can_setting *setting;

Could be:
struct nct6694_can_setting *setting __free(kfree) = NULL;

to slightly simplify code below.


> +	struct nct6694_cmd_header cmd_hd = {
> +		.mod = NCT6694_CAN_MOD,
> +		.cmd = NCT6694_CAN_SETTING,
> +		.sel = priv->can_idx,
> +		.len = cpu_to_le16(sizeof(*setting))
> +	};

...

> +static int nct6694_can_get_clock(struct nct6694_can_priv *priv)
> +{
> +	struct nct6694_can_information *info;

Could be:
struct nct6694_can_information *info __free(kfree) = NULL;

to slightly simplify code below.

> +	static const struct nct6694_cmd_header cmd_hd = {
> +		.mod = NCT6694_CAN_MOD,
> +		.cmd = NCT6694_CAN_INFORMATION,
> +		.sel = NCT6694_CAN_INFORMATION_SEL,
> +		.len = cpu_to_le16(sizeof(*info))
> +	};
> +	int ret, can_clk;
> +
> +	info = kzalloc(sizeof(*info), GFP_KERNEL);
> +	if (!info)
> +		return -ENOMEM;

...

CJ