linux-kernel - Re: [PATCH] staging: slicoss: Fix prefer ether_addr

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Message-ID: <5328D1EF.70709@gmail.com>
Date:	Tue, 18 Mar 2014 17:08:31 -0600
From:	Joel Pelaez Jorge <joelpelaez@...il.com>
To:	Jingoo Han <jg1.han@...sung.com>
CC:	'Greg Kroah-Hartman' <gregkh@...uxfoundation.org>,
	'Joe Perches' <joe@...ches.com>,
	'Rashika Kheria' <rashika.kheria@...il.com>,
	'Peter P Waskiewicz Jr' <peter.p.waskiewicz.jr@...el.com>,
	linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org,
	'Wei Yongjun' <yongjun_wei@...ndmicro.com.cn>,
	'Dan Carpenter' <dan.carpenter@...cle.com>
Subject: Re: [PATCH] staging: slicoss: Fix prefer ether_addr_copy over memcpy

El 17/03/14 23:49, Jingoo Han escribió:
> On Tuesday, March 18, 2014 2:04 PM, Joel Pelaez Jorge wrote:
>>
>>
>> @@ -810,8 +810,8 @@ static int slic_mac_set_address(struct net_device
>> *dev, void *ptr)
>>    	if (!is_valid_ether_addr(addr->sa_data))
>>    		return -EINVAL;
>>
>> -	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
>> -	memcpy(adapter->currmacaddr, addr->sa_data, dev->addr_len);
>> +	ether_addr_copy(dev->dev_addr, addr->sa_data);
>> +	ether_addr_copy(adapter->currmacaddr, addr->sa_data);
>
> By the way, I am wondering if 'dev->addr_len' is 6 bytes.
> Is there anyone who can confirm it?
>
> If nobody can confirm 'dev->addr_len' is 6 bytes, it should
> not be changed to 'ether_addr_copy()'.
>
> Best regards,
> Jingoo Han
>
In the first case, is necessary use memcpy for copy te ethernet address 
to dev->dev_addr because this is a pointer, uses dev->addr_len for 
define size.

But in the second, adapter->currmacaddr is fixed to 6 size, so that here 
one can use ether_addr_copy without issues.

--
Best regards,
Joel Pelaez Jorge
Joel Pelaez Jorge


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