netdev - Re: [PATCH net] ip_gre: remove the incorrect mtu limit for ipgre tap

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Message-Id: <20171219.134614.2202609526764522327.davem@davemloft.net>
Date:   Tue, 19 Dec 2017 13:46:14 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, jarod@...hat.com
Subject: Re: [PATCH net] ip_gre: remove the incorrect mtu limit for ipgre
 tap

From: Xin Long <lucien.xin@...il.com>
Date: Mon, 18 Dec 2017 14:24:35 +0800

> ipgre tap driver calls ether_setup(), after commit 61e84623ace3
> ("net: centralize net_device min/max MTU checking"), the range
> of mtu is [min_mtu, max_mtu], which is [68, 1500] by default.
> 
> It causes the dev mtu of the ipgre tap device to not be greater
> than 1500, this limit value is not correct for ipgre tap device.
> 
> Besides, it's .change_mtu already does the right check. So this
> patch is just to set max_mtu as 0, and leave the check to it's
> .change_mtu.
> 
> Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking")
> Reported-by: Jianlin Shi <jishi@...hat.com>
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied.