netdev - Regression since e0b46d0ee9c240c7430a47e9b0365674d4a04522

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Message-ID: <CA+E=qVfyt_8VrRLwS9bJaZ+QamFDdAtXviODV9y4uZt6tjNEow@mail.gmail.com>
Date:	Thu, 26 Mar 2015 11:18:29 +0300
From:	Vasily Khoruzhick <anarsoul@...il.com>
To:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	Monam Agarwal <monamagarwal123@...il.com>,
	Xi Wang <xii@...gle.com>, Christoph Hellwig <hch@....de>,
	Jeff Layton <jlayton@...marydata.com>,
	Tom Gundersen <teg@...m.no>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: Regression since e0b46d0ee9c240c7430a47e9b0365674d4a04522

Hi,

Juniper VPN client is not working since upgrade to linux-3.19,

I did a bisect between v3.18 and v3.19 and it shows that culprit is:

Author: Herbert Xu <herbert@...dor.apana.org.au>
Date:   Fri Nov 7 21:22:23 2014 +0800

   tun: Use iovec iterators


I wasn't able to revert this patch, since result doesn't compile due
to lack of skb_copy_datagram_const_iovec()

I can't analyze what happens on Juniper VPN client, since I have no
access to its source code (it's provided in binary form only).

Regards,
Vasily
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