From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.thorsis.com (mail.thorsis.com [217.92.40.78]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ECE1F3451A7; Thu, 19 Feb 2026 15:36:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.92.40.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771515421; cv=none; b=Ob36+vZf7AmufgGLNEzQQ6UyGR6m/+CSUNO1zexy2WNbrxcMpAXyGdKBkt7SSZVcaVUWU0qB4uKJjM/0i1H0CrgsT88n2p1oSB4buNt0hK1uMLDxaUQ2SLpnu0BXAPd1fZNvoB5BLwTKTh3kHjt1t8h8vo4OB8Oz7KJ5Y5LpY9I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771515421; c=relaxed/simple; bh=FtxsfZVG+UyeZeesGRnVoCjX4vtU9MuQ61F/Ejwoylk=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ITRkXqHZg8s76NabJ3CQ/mm0w0GxENN2fMC6JZtfYJl4OMtYt9z/Qu/1Bd7kw2exDw9erwR08aQwIagzCeJV3drV5hk2v7XKXiQ+5Gymucdy9s/9pLKN3x9rDsJ+B5W5KeTECihxzFNCMkoh/DX/NQ98Kr24nChVlJ9lNf9rzvg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=thorsis.com; spf=pass smtp.mailfrom=thorsis.com; dkim=pass (2048-bit key) header.d=thorsis.com header.i=@thorsis.com header.b=IeDBh943; arc=none smtp.client-ip=217.92.40.78 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=thorsis.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=thorsis.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=thorsis.com header.i=@thorsis.com header.b="IeDBh943" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 56F651483189; Thu, 19 Feb 2026 16:36:54 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=thorsis.com; s=dkim; t=1771515417; h=from:subject:date:message-id:to:cc:mime-version:content-type: in-reply-to:references; bh=1AE1AmYfvATrMvyJE4ZzKXon+W6nliw611/s/YfGS68=; b=IeDBh943I007i0SbNfYfqY1DhYKrBB6M0hoXqlo9oXlXPWIYy5aKQkJJhjki771Feu1KqK 9vaDD2gMIQNZWYWrol4O6TevD0HVs7uDSK6Ax0J0YDXFKYvgeGY6nlNFTmtmnCht12dxNA tLB60zs7sQLKyLJheFI1aTkpPcvWAsMUlr49ZNqACcU6dvOdEz9w8iLPZSaATe+sv2Y+xG BKyd99Xn6FcVfhvn6Rr3+4B5miODha/EN+a7nnPIOv6Nx/uvKLrDQ+7/7zGWxYEGcPAd6Z KlAjylnD4ZeO2yEWgcgk5LiTJXpHPfwRJLYkS+I1NoUt7646dykHP/MDFXAwtg== Date: Thu, 19 Feb 2026 16:36:53 +0100 From: Alexander Dahl To: Kevin Hao Cc: Xiaolei Wang , 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() Message-ID: <20260219-zeppelin-scope-8cf10fdf1d43@thorsis.com> Mail-Followup-To: Kevin Hao , Xiaolei Wang , 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 References: <20251222015624.1994551-1-xiaolei.wang@windriver.com> <20260219-knapsack-thirteen-7d9e83451a40@thorsis.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/2.2.13 (2024-03-09) X-Last-TLS-Session-Version: TLSv1.3 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