linux-kernel - Re: [PATCH] staging: octeon: Replace memcpy with ETH

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Message-ID: <1413574848.14629.6.camel@perches.com>
Date:	Fri, 17 Oct 2014 12:40:48 -0700
From:	Joe Perches <joe@...ches.com>
To:	Balavasu <kp.balavasu@...il.com>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: octeon: Replace memcpy with ETH_ALEN

On Sat, 2014-10-18 at 00:17 +0530, Balavasu wrote:
> This patch fixes the checkpatch.pl issue
> WARNING: memcpy(dev->dev_addr, mac, ETH_ALEN);

That is not the actual warning.

This is the warning:

Prefer ether_addr_copy() over memcpy() if the Ethernet addresses are __aligned(2)

How have you made sure that mac can not have odd alignment?

Make sure your commit message shows how you know
that mac is appropriately aligned.

> diff --git a/drivers/staging/octeon/ethernet.c b/drivers/staging/octeon/ethernet.c
[]
> @@ -452,7 +452,7 @@ int cvm_oct_common_init(struct net_device *dev)
>  		mac = of_get_mac_address(priv->of_node);
>  
>  	if (mac)
> -		memcpy(dev->dev_addr, mac, ETH_ALEN);
> +		ether_addr_copy(dev->dev_addr, mac);
>  	else
>  		eth_hw_addr_random(dev);
>  


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