Subject: Re: [PATCH net] net: dsa: fix bonding with ARP monitoring by updating trans_start manually

From: Jakub Kicinski <[email-masked]>
Date: Fri, 15 Jul 2022 17:00:42 -0700

On Sat, 16 Jul 2022 02:26:41 +0300 Vladimir Oltean wrote:
> Documentation/networking/bonding.rst points out that for ARP monitoring
> to work, dev_trans_start() must be able to verify the latest trans_start
> update of any slave_dev TX queue. However, with NETIF_F_LLTX,
> netdev_start_xmit() -> txq_trans_update() fails to do anything, because
> the TX queue hasn't been locked.
> 
> Fix this by manually updating the current TX queue's trans_start for
> each packet sent.
> 
> Fixes: 2b86cb829976 ("net: dsa: declare lockless TX feature for slave ports")
> Reported-by: Brian Hutchinson <[email-masked]>
> Signed-off-by: Vladimir Oltean <[email-masked]>

Did you see my discussion with Jay? Let's stop the spread of this
workaround, I'm tossing..