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Date:	Fri, 02 Jan 2015 15:56:21 -0500 (EST)
From:	David Miller <>
Subject: Re: [PATCH net-next] net: More vlan tests before registering

From: Yuval Mintz <>
Date: Wed, 31 Dec 2014 08:35:36 +0200

> When register_netdevice() is called, netdevice's vlan filtering feature
> and supplied callbacks are checked to see the vlan implementation is
> not buggy.
> This adds an additional test - see that the vlan_features were filled
> correctly, as the vlan devices inherits those as its own features;
> Incorrect values set there would later prevent the vlan interface from being
> registered itself [as it doesn't implement the filtering ndos].
> Signed-off-by: Yuval Mintz <>
> Not sure why take such a defensive approach regarding this feature.
> Perhaps it would have been better to simply remove these checks altogether.

I guess this is fine as a defensive test, so I'll apply this.

But do you actually know of any devices which have violated this rule
either now or in the past?  I quickly tried to audit the entire tree
for this right now and found no problems.
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