linux-kernel - Re: [PATCH net-next v7 14/15] net: stmmac: dwmac-s32: add basic NXP S32G/S32R glue driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <b9ad385b-7702-4c71-b14f-64f2714a35a4@lunn.ch>
Date: Tue, 3 Dec 2024 00:43:58 +0100
From: Andrew Lunn <andrew@...n.ch>
To: jan.petrous@....nxp.com
Cc: Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Vinod Koul <vkoul@...nel.org>,
	Richard Cochran <richardcochran@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Emil Renner Berthing <kernel@...il.dk>,
	Minda Chen <minda.chen@...rfivetech.com>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Iyappan Subramanian <iyappan@...amperecomputing.com>,
	Keyur Chudgar <keyur@...amperecomputing.com>,
	Quan Nguyen <quan@...amperecomputing.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	imx@...ts.linux.dev, devicetree@...r.kernel.org,
	NXP S32 Linux Team <s32@....com>, 0x1207@...il.com,
	fancer.lancer@...il.com
Subject: Re: [PATCH net-next v7 14/15] net: stmmac: dwmac-s32: add basic NXP
 S32G/S32R glue driver

> +static int s32_gmac_init(struct platform_device *pdev, void *priv)
> +{
> +	struct s32_priv_data *gmac = priv;
> +	int ret;
> +
> +	ret = clk_set_rate(gmac->tx_clk, GMAC_TX_RATE_125M);
> +	if (!ret)
> +		ret = clk_prepare_enable(gmac->tx_clk);
> +
> +	if (ret) {
> +		dev_err(&pdev->dev, "Can't set tx clock\n");
> +		return ret;
> +	}

The ordering is a bit odd here. Normally you would test each operation
individually for errors. So:

	ret = clk_set_rate(gmac->tx_clk, GMAC_TX_RATE_125M);
	if (ret) {
		dev_err(&pdev->dev, "Can't set tx clock\n");
		return ret;
	}
	ret = clk_prepare_enable(gmac->tx_clk);
	if (ret) {
		dev_err(&pdev->dev, "Can't enable tx clock\n");
		return ret;
	}


> +
> +	ret = clk_prepare_enable(gmac->rx_clk);
> +	if (ret) {
> +		clk_disable_unprepare(gmac->tx_clk);
> +		dev_err(&pdev->dev, "Can't set rx clock\n");
> +		return ret;
> +	}

Is there no need to set the TX clock rate?

	Andrew