From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] netvsc: fix deadlock betwen link status and removal
Date: Thu, 24 Aug 2017 21:59:37 -0700 (PDT)
Message-ID: <20170824.215937.1021389588491858224.davem@davemloft.net>
References: <20170824234916.11490-1-sthemmin@microsoft.com>
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Cc: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com,
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To: stephen@networkplumber.org
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From: Stephen Hemminger <stephen@networkplumber.org>
Date: Thu, 24 Aug 2017 16:49:16 -0700

> There is a deadlock possible when canceling the link status
> delayed work queue. The removal process is run with RTNL held,
> and the link status callback is acquring RTNL.
> 
> Resolve the issue by using trylock and rescheduling.
> If cancel is in process, that block it from happening.
> 
> Fixes: 122a5f6410f4 ("staging: hv: use delayed_work for netvsc_send_garp()")
> Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>

Applied and queued up for -stable, thanks.