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Date: Tue, 9 Jun 2026 19:35:17 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Cc: Luiz Angelo Daros de Luca <luizluca@gmail.com>, Andrew Lunn
 <andrew@lunn.ch>, Vladimir Oltean <olteanv@gmail.com>, "David S. Miller"
 <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Paolo Abeni
 <pabeni@redhat.com>, Simon Horman <horms@kernel.org>, Linus Walleij
 <linusw@kernel.org>, Alvin =?UTF-8?B?xaBpcHJhZ2E=?= <alsi@bang-olufsen.dk>,
 Yury Norov <yury.norov@gmail.com>, Rasmus Villemoes
 <linux@rasmusvillemoes.dk>, Russell King <linux@armlinux.org.uk>,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [net-next PATCH v13 2/9] net: dsa: realtek: rtl8365mb: reject
 unsupported topologies
Message-ID: <20260609193517.1ca93f1c@kernel.org>
In-Reply-To: <617aa489-4f0c-4fe0-8cf3-55c98f4d4d9e@yahoo.com>
References: <20260606-realtek_forward-v13-0-b9e409687cbe@gmail.com>
	<20260606-realtek_forward-v13-2-b9e409687cbe@gmail.com>
	<617aa489-4f0c-4fe0-8cf3-55c98f4d4d9e@yahoo.com>
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On Sun, 7 Jun 2026 14:55:07 +0200 Mieczyslaw Nalewaj wrote:
> >drivers/net/dsa/realtek/rtl8365mb.c:rtl8365mb_get_stats64() {
> >    ...
> >	mb = priv->chip_data;
> >	p = &mb->ports[port];
> >	spin_lock(&p->stats_lock);
> >	memcpy(s, &p->stats, sizeof(*s));
> >	spin_unlock(&p->stats_lock);
> >}  
> 
> Sashiko reports a potential deadlock around stats_lock, however I
> couldn't find a call chain reaching rtl8365mb_get_stats64() from
> softirq context. Can anyone point to such a path?

I'm not sure where it got that from either, but it keeps complaining
about ndo_get_stats64 from BH on multiple drivers.