netdev - Re: [PATCH] [NET] [ISDN]: Do not validate ISDN net device address prior to interface-up

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Date:	Sun, 13 Apr 2008 08:29:51 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Paul Bolle <pebolle@...cali.nl>
CC:	netdev@...r.kernel.org, isdn4linux@...tserv.isdn4linux.de,
	Jeff Garzik <jgarzik@...hat.com>
Subject: Re: [PATCH] [NET] [ISDN]: Do not validate ISDN net device address
 prior to interface-up

Paul Bolle wrote:
> From: Paul Bolle <pebolle@...cali.nl>
>    
> Commit bada339 (Validate device addr prior to interface-up) caused a regression
> in the ISDN network code, see: http://bugzilla.kernel.org/show_bug.cgi?id=9923
> The trivial fix is to remove the pointer to eth_validate_addr() in the
> net_device struct in isdn_net_init().
>     
> Signed-off-by: Paul Bolle <pebolle@...cali.nl>
> ---
> Please note that I hardly know what the device address validation is good for.
> Neither do I know much about the ISDN network code or why the device address
> validation fails for ISDN interfaces. This patch however basically reverts 
> commit bada339 just for the ISDN network code. I can't think of any side
> effects.

The patch looks fine. is_valid_ether_addr() fails because the ISDN
device's address is 00:00:00:00:00:00 at this point.

> http://bugzilla.kernel.org/show_bug.cgi?id=9923 would have been much easier to
> track down if eth_validate_addr() would somehow complain aloud if an address 
> is invalid. Shouldn't it make at least some noise?

I guess it should return -EADDRNOTAVAIL similar to eth_mac_addr()
when validation fails.

Signed-off-by: Patrick McHardy <kaber@...sh.net>


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