linux-kernel - Re: [PATCH 3/4] net: macb: Drop nvmem_get_mac

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Message-ID: <20190427164408.GD9816@lunn.ch>
Date:   Sat, 27 Apr 2019 18:44:08 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Petr Štetiar <ynezz@...e.cz>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Alban Bedel <albeu@...e.fr>
Subject: Re: [PATCH 3/4] net: macb: Drop nvmem_get_mac_address usage

On Sat, Apr 27, 2019 at 01:06:41AM +0200, Petr Štetiar wrote:
> of_get_mac_address now uses NVMEM under the hood, so it's not necessary
> to call it manually anymore.
> 
> Signed-off-by: Petr Štetiar <ynezz@...e.cz>
> ---
>  drivers/net/ethernet/cadence/macb_main.c | 12 +++---------
>  1 file changed, 3 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 3da2795..1b98bc8 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -4172,16 +4172,10 @@ static int macb_probe(struct platform_device *pdev)
>  		bp->rx_intr_mask |= MACB_BIT(RXUBR);
>  
>  	mac = of_get_mac_address(np);
> -	if (mac) {
> +	if (mac)
>  		ether_addr_copy(bp->dev->dev_addr, mac);
> -	} else {
> -		err = nvmem_get_mac_address(&pdev->dev, bp->dev->dev_addr);
> -		if (err) {
> -			if (err == -EPROBE_DEFER)
> -				goto err_out_free_netdev;
> -			macb_get_hwaddr(bp);
> -		}
> -	}

Here we have an ordering problem. The current code looks for NVMEM
after local-mac-address and mac-address. You change will make it look
for NVMEM first.

    Andrew