netdev - [PATCH net 0/2] nfp: fix retcode and disable netpoll on representors

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Message-Id: <20190327183839.18889-1-jakub.kicinski@netronome.com>
Date:   Wed, 27 Mar 2019 11:38:37 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     oss-drivers@...ronome.com, netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net 0/2] nfp: fix retcode and disable netpoll on representors

Hi!

This series avoids a potential crash on nfp representor devices
when netpoll is in use.  If transmitting the frame through underlying
vNIC fails we'd return an error code (by passing on error code from
__dev_queue_xmit()) and cause double free in netpoll code.

Fix the error code and disable netpoll on reprs altogether.
IRQ-safety of locking the queues and calling __dev_queue_xmit()
is questionable.

Big thanks to John Hurley for debugging and narrowing down
the trace log after I gave up! :)

Jakub Kicinski (2):
  nfp: validate the return code from dev_queue_xmit()
  nfp: disable netpoll on representors

 drivers/net/ethernet/netronome/nfp/nfp_net_repr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

-- 
2.19.2