linux-kernel - Re: [Patch v3 08/11] net: ethernet: xilinx: Generate random mac if none found

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Date:   Thu, 1 Sep 2016 13:52:37 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>,
        monstr@...str.eu, ralf@...ux-mips.org, tglx@...utronix.de,
        jason@...edaemon.net, marc.zyngier@....com
Cc:     soren.brinkmann@...inx.com, linux-kernel@...r.kernel.org,
        linux-mips@...ux-mips.org, michal.simek@...inx.com,
        netdev@...r.kernel.org
Subject: Re: [Patch v3 08/11] net: ethernet: xilinx: Generate random mac if
 none found

Hello.

On 8/31/2016 7:35 PM, Zubair Lutfullah Kakakhel wrote:

> At the moment, if the emaclite device doesn't find a mac address
> from any source, it simply uses 0x0 with a warning printed.
>
> Instead of using a 0x0 mac address, use a randomly generated one.
>
> Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@...tec.com>
[...]

> diff --git a/drivers/net/ethernet/xilinx/xilinx_emaclite.c b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> index 3cee84a..22e5a5a 100644
> --- a/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> +++ b/drivers/net/ethernet/xilinx/xilinx_emaclite.c
> @@ -1134,8 +1134,10 @@ static int xemaclite_of_probe(struct platform_device *ofdev)
>  	if (mac_address)
>  		/* Set the MAC address. */
>  		memcpy(ndev->dev_addr, mac_address, ETH_ALEN);
> -	else
> -		dev_warn(dev, "No MAC address found\n");
> +	else {
> +		dev_warn(dev, "No MAC address found. Generating Random one\n");
> +		eth_hw_addr_random(ndev);
> +	}

    All branches of the *if* statement should have {} if at least one has 
them, see Documentation/CodingStyle, chaoter 3.

[...]

MBR, Sergei