netdev - Re: [PATCH] ipv4: don't call inetdev_init() if device is no longer registered

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Message-ID: <20260125121551.GA83275@shredder>
Date: Sun, 25 Jan 2026 14:15:51 +0200
From: Ido Schimmel <idosch@...dia.com>
To: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
Cc: Jiri Pirko <jiri@...nulli.us>, Breno Leitao <leitao@...ian.org>,
	"David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCH] ipv4: don't call inetdev_init() if device is no longer
 registered

On Sun, Jan 25, 2026 at 08:21:08PM +0900, Tetsuo Handa wrote:
> We would need to update team driver side not to trigger dev_set_mtu().
> Below diff passed the reproducer, but I don't know whether it is safe
> to trigger dev_set_mtu() for team_uninit() and team_del_slave() and
> the err_port_enter: label of team_port_add()...

I just checked and the same issue was fixed in the bond driver in commit
f51048c3e07b ("bonding: avoid NETDEV_CHANGEMTU event when unregistering
slave"), so I would try a similar fix in team.

A solution in the core would be better, but I don't know if it's
possible and the blast radius would also be bigger, so it's something to
think about for net-next.