netdev - Re: [PATCH] Documentation: document the gianfar tx vlan offload issue

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Date:	Fri, 04 Apr 2014 09:56:33 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	roy.qing.li@...il.com
Cc:	netdev@...r.kernel.org, claudiu.manoil@...escale.com,
	Yanjun.Zhu@...driver.com
Subject: Re: [PATCH] Documentation: document the gianfar tx vlan offload
 issue

From: roy.qing.li@...il.com
Date: Fri,  4 Apr 2014 11:04:45 +0800

> +But if tx vlan tag hardware insertion is enabled, and a vlan-device is
> +created, the physical device which vlan device is on will be unable to
> +work, like:
> +
> +	$ethtool -K eth0 tx-vlan-stag-hw-insert on
> +	$ifconfig eth0 192.168.1.13/24 up
> +
> +	$vconfig add eth0 4091
> +	$ifconfig eth0.4091 10.1.1.13/24 up
> +eth0.4091 can work, but eth0 can not work, since eth0 sends the insane
> +packets out.

This is a bit of a joke.

If a configuration doesn't work properly, it should be disallowed
by the driver, rather than "documented".
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