Re: [PATCH] netvsc: fix deadlock betwen link status and removal
flat view
From: David Miller <davem@davemloft.net>
Date: 2017-08-25 04:59:38
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 <redacted>Applied and queued up for -stable, thanks.