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Subject: Re: [PATCH] [RFC] increase MAX_ADDR_LEN
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "David S. Miller" <davem@redhat.com>
Cc: roland@topspin.com,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On Mon, 2002-11-11 at 23:38, David S. Miller wrote:
> 
> So how are apps able to specify such larger hw addresses to configure
> a driver if IFHWADDRLEN is still 6?
> 
> I'm not going to increase MAX_ADDR_LEN if there is no user ABI capable
> of configuring such larger addresses properly.

The kernel just ignores it. We support multiple devices with larger
address lengths. Its mostly a legacy constant

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