netdev - Re: [PATCH net] openvswitch: fix hangup on vxlan/gre/geneve device deletion

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Message-Id: <20151203.143048.662288701351689156.davem@davemloft.net>
Date:	Thu, 03 Dec 2015 14:30:48 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	pabeni@...hat.com
Cc:	netdev@...r.kernel.org, pshelar@...ira.com, tgraf@...g.ch,
	dev@...nvswitch.org, fbl@...close.org
Subject: Re: [PATCH net] openvswitch: fix hangup on vxlan/gre/geneve device
 deletion

From: Paolo Abeni <pabeni@...hat.com>
Date: Tue,  1 Dec 2015 18:33:36 +0100

> Each openvswitch tunnel vport (vxlan,gre,geneve) holds a reference
> to the underlying tunnel device, but never released it when such
> device is deleted.
> Deleting the underlying device via the ip tool cause the kernel to
> hangup in the netdev_wait_allrefs() loop.
> This commit ensure that on device unregistration dp_detach_port_notify()
> is called for all vports that hold the device reference, properly
> releasing it.
> 
> Fixes: 614732eaa12d ("openvswitch: Use regular VXLAN net_device device")
> Fixes: b2acd1dc3949 ("openvswitch: Use regular GRE net_device instead of vport")
> Fixes: 6b001e682e90 ("openvswitch: Use Geneve device.")
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied and queued up for -stable, thank you.
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