netdev - Disable TX path on eth I/F from driver?

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Message-ID: <e267c94aad6f2a7f0427832d13afc60e6bcd5c6e.camel@infinera.com>
Date: Fri, 30 Jun 2023 15:48:15 +0000
From: Joakim Tjernlund <Joakim.Tjernlund@...inera.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Disable TX path on eth I/F from driver?

We have a few eth I/F that is for monitoring only, if any TX one gets:
NETDEV WATCHDOG: trap0 (xr-ccip): transmit queue 0 timed out
[   55.903074] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:477 dev_watchdog+0x138/0x160
[   55.911380] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.109-00161-g1268ae25c302-dirty #7
<long trace snipped>

I would like to, from within the driver, disable the TX path so the IP stack cannot TX any
pkgs but cannot find a way to do so.
Is there a way(to at least avid the NETDEV WATCHDOG msg) disable TX?
On kernel 5.15

 Jocke