linux-kernel - Re: [PATCH net-next] sysfs: add attribute to indicate hw address assignment type

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Message-Id: <1279807643.2104.1.camel@achroite.uk.solarflarecom.com>
Date:	Thu, 22 Jul 2010 15:07:23 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Stefan Assmann <sassmann@...hat.com>
Cc:	David Miller <davem@...emloft.net>, abadea@...acom.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	gospo@...hat.com, gregory.v.rose@...el.com,
	alexander.h.duyck@...el.com, leedom@...lsio.com, harald@...hat.com
Subject: Re: [PATCH net-next] sysfs: add attribute to indicate hw address
 assignment type

On Thu, 2010-07-22 at 14:50 +0200, Stefan Assmann wrote:
> On 21.07.2010 15:54, Ben Hutchings wrote:
> > On Wed, 2010-07-21 at 10:10 +0200, Stefan Assmann wrote:
> >> I put Alex' idea into code for further discussion, keeping the names
> >> mentioned here until we agree on the scope of this attribute. When we
> >> have settled I'll post a patch with proper patch description.
> > [...]
> > 
> > Just a little nitpick: I think it would be clearer to use a more
> > specific term like 'address source' or 'address assignment type' rather
> > than 'address type'.
> 
> Here's a proposal for the final patch.

Looks good, but...

[...]
>  /**
> + * dev_hw_addr_random - Create random MAC and set device flag
> + * @dev: pointer to net_device structure
> + * @addr: Pointer to a six-byte array containing the Ethernet address
> + *
> + * Generate random MAC to be used by a device and set addr_assign_type
> + * so the state can be read by sysfs and be used by udev.
> + */
> +static inline void dev_hw_addr_random(struct net_device *dev, u8 *hwaddr)
> +{
> +	dev->addr_assign_type |= NET_ADDR_RANDOM;
> +	random_ether_addr(hwaddr);
> +}
[...]

...why '|=' and not '='?

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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