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Date:   Mon, 27 Aug 2018 15:14:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, u9012063@...il.com
Subject: Re: [PATCH net] erspan: set erspan_ver to 1 by default when adding
 an erspan dev

From: Xin Long <lucien.xin@...il.com>
Date: Mon, 27 Aug 2018 18:41:32 +0800

> After erspan_ver is introudced, if erspan_ver is not set in iproute, its
> value will be left 0 by default. Since Commit 02f99df1875c ("erspan: fix
> invalid erspan version."), it has broken the traffic due to the version
> check in erspan_xmit if users are not aware of 'erspan_ver' param, like
> using an old version of iproute.
> 
> To fix this compatibility problem, it sets erspan_ver to 1 by default
> when adding an erspan dev in erspan_setup. Note that we can't do it in
> ipgre_netlink_parms, as this function is also used by ipgre_changelink.
> 
> Fixes: 02f99df1875c ("erspan: fix invalid erspan version.")
> Reported-by: Jianlin Shi <jishi@...hat.com>
> Signed-off-by: Xin Long <lucien.xin@...il.com>

Applied and queued up for -stable.

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