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Date:	Wed, 9 Oct 2013 18:24:08 -0700
From:	Jesse Gross <jesse@...ira.com>
To:	Alexei Starovoitov <ast@...mgrid.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Pravin B Shelar <pshelar@...ira.com>,
	Jiri Pirko <jiri@...nulli.us>,
	"dev@...nvswitch.org" <dev@...nvswitch.org>,
	netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] openvswitch: fix vport-netdev unregister

On Tue, Oct 8, 2013 at 8:07 PM, Alexei Starovoitov <ast@...mgrid.com> wrote:
> The combination of two commits
>
> commit 8e4e1713e4
> ("openvswitch: Simplify datapath locking.")
>
> and
>
> commit 2537b4dd0a
> ("openvswitch:: link upper device for port devices")
>
> introduced a bug where upper_dev wasn't unlinked upon
> netdev_unregister notification
>
> The following steps:
>
>   modprobe openvswitch
>   ovs-dpctl add-dp test
>   ip tuntap add dev tap1 mode tap
>   ovs-dpctl add-if test tap1
>   ip tuntap del dev tap1 mode tap
>
> are causing multiple warnings:

[...]

Hmm, you are right. Pravin mentioned some concerns about layering with
this patch so I believe he's trying to think of a way to minimize
that.
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