netdev - Re: [PATCH] net: moxa: MAC address reading, generating, validity checking

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Date:   Thu, 18 Aug 2022 04:29:20 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Sergei Antonov <saproj@...il.com>
Cc:     netdev@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Vladimir Oltean <olteanv@...il.com>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Pavel Skripkin <paskripkin@...il.com>,
        Yang Wei <yang.wei9@....com.cn>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: Re: [PATCH] net: moxa: MAC address reading, generating, validity
 checking

> @@ -539,6 +533,11 @@ static int moxart_mac_probe(struct platform_device *pdev)
>  
>  	SET_NETDEV_DEV(ndev, &pdev->dev);
>  
> +	ret = platform_get_ethdev_address(p_dev, ndev);
> +	if (ret)
> +		eth_hw_addr_random(ndev);

You should look at the return value. It could be EPROBE_DEFFER,
because the EEPROM has not probed yet. You need to return this value,
so that the device core will probe other devices, including the
EEPROM, and then later reprobe this driver.

	Andrew