linux-kernel - Re: [PATCH net-next v4 02/10] net: sparx5: add the basic sparx5 driver

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Message-ID: <2800a872ff4260fc7a942f2f2ea1c9e3603b13d7.camel@pengutronix.de>
Date:   Tue, 15 Jun 2021 15:22:39 +0200
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Steen Hegelund <steen.hegelund@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Andrew Lunn <andrew@...n.ch>, Russell King <linux@...linux.org.uk>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Mark Einon <mark.einon@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Simon Horman <simon.horman@...ronome.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Bjarni Jonasson <bjarni.jonasson@...rochip.com>,
        Lars Povlsen <lars.povlsen@...rochip.com>
Subject: Re: [PATCH net-next v4 02/10] net: sparx5: add the basic sparx5
 driver

Hi Steen,

On Tue, 2021-06-15 at 10:50 +0200, Steen Hegelund wrote:
> This adds the Sparx5 basic SwitchDev driver framework with IO range
> mapping, switch device detection and core clock configuration.
> 
> Support for ports, phylink, netdev, mactable etc. are in the following
> patches.
> 
> Signed-off-by: Steen Hegelund <steen.hegelund@...rochip.com>
> Signed-off-by: Bjarni Jonasson <bjarni.jonasson@...rochip.com>
> Signed-off-by: Lars Povlsen <lars.povlsen@...rochip.com>
[...]
> diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_main.c b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
> new file mode 100644
> index 000000000000..892bbbaacbd6
> --- /dev/null
> +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_main.c
> @@ -0,0 +1,743 @@
[...]
> +static int mchp_sparx5_probe(struct platform_device *pdev)
> +{
[...]
> +	/* Do switch core reset if available */
> +	reset = devm_reset_control_get_optional_shared(&pdev->dev, "switch");

Please don't ignore errors here. For example:

	if (IS_ERR(reset))
		return dev_err_probe(&pdev->dev, PTR_ERR(reset),
				     "Failed to get reset.\n");

> 	reset_control_reset(reset);

regards
Philipp