From: Alexander Dahl <ada@thorsis.com>
To: Kevin Hao <kexin.hao@windriver.com>
Cc: Xiaolei Wang <xiaolei.wang@windriver.com>,
pabeni@redhat.com, nicolas.ferre@microchip.com,
claudiu.beznea@tuxon.dev, andrew+netdev@lunn.ch,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
rmk+kernel@armlinux.org.uk, netdev@vger.kernel.org,
stable@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-rt-users@vger.kernel.org
Subject: Re: [PATCH net v3] net: macb: Relocate mog_init_rings() callback from macb_mac_link_up() to macb_open()
Date: Thu, 19 Feb 2026 16:36:53 +0100 [thread overview]
Message-ID: <20260219-zeppelin-scope-8cf10fdf1d43@thorsis.com> (raw)
In-Reply-To: <aZcjqF1E57E-i5aS@pek-khao-d3>
Hello Kevin,
Am Thu, Feb 19, 2026 at 10:52:24PM +0800 schrieb Kevin Hao:
> On Thu, Feb 19, 2026 at 03:34:54PM +0100, Alexander Dahl wrote:
> > After upgrading from 6.12.57-rt14 to 6.12.66-rt15 on a custom at91
> > sam9x60 based board with PREEMPT_RT patch, we noticed a complete
> > system lockup, which I bisected to this changeset.
> >
> > After unplugging and plugging the ethernet cable, while
> > running PROFINET, system does not respond to anything anymore.
> > Last message in kernel log is:
> >
> > [ +8.621919] macb f802c000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
> >
> > Heartbeat LED does not blink anymore, no network communication,
> > serial console does not respond anymore.
> >
> > Reverting that change locally prevents the system lockup for me, but
> > what is the proper course of action on kernel side now? Send a revert
> > to stable? Send a revert to master? Please advise.
> >
> > (I'm aware there were least two more patches on netdev referencing
> > this change, but if I'm not mistaken none of those made it to stable,
> > right?)
>
> A fix for this commit is available in the latest mainline kernel. Could you
> please verify whether it resolves the issue you encountered?
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bf9cf80cab81e39701861a42877a28295ade266f
Verified by replacing the revert with your patch backported to my
6.12.66-rt15 based tree. Answered to your patch mail, so hopefully
that change hits stable soon. Thanks for your effort.
Greets
Alex
>
> Thanks,
> Kevin
prev parent reply other threads:[~2026-02-19 15:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-22 1:56 [PATCH net v3] net: macb: Relocate mog_init_rings() callback from macb_mac_link_up() to macb_open() Xiaolei Wang
2025-12-30 10:30 ` patchwork-bot+netdevbpf
2026-02-19 14:34 ` Alexander Dahl
2026-02-19 14:52 ` Kevin Hao
2026-02-19 15:36 ` Alexander Dahl [this message]
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