netdev - Re: [PATCH] netvsc: fix deadlock betwen link status and removal

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Date:   Thu, 24 Aug 2017 21:59:37 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     stephen@...workplumber.org
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH] netvsc: fix deadlock betwen link status and removal

From: Stephen Hemminger <stephen@...workplumber.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@...rosoft.com>

Applied and queued up for -stable, thanks.