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Date: Mon, 13 Apr 2026 08:44:45 -0700
From: Jakub Kicinski <kuba@kernel.org>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Marek Vasut <marex@nabladev.com>, netdev@vger.kernel.org,
 stable@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, Andrew
 Lunn <andrew+netdev@lunn.ch>, Eric Dumazet <edumazet@google.com>, Nicolai
 Buchwitz <nb@tipi-net.de>, Paolo Abeni <pabeni@redhat.com>, Ronald Wahl
 <ronald.wahl@raritan.com>, Yicong Hui <yiconghui@gmail.com>,
 linux-kernel@vger.kernel.org, Thomas Gleixner <tglx@kernel.org>
Subject: Re: [net,PATCH v2] net: ks8851: Reinstate disabling of BHs around
 IRQ handler
Message-ID: <20260413084445.59fe28d6@kernel.org>
In-Reply-To: <20260413125744.TVKkZcEK@linutronix.de>
References: <20260408162535.98108-1-marex@nabladev.com>
	<20260412090141.21bf1534@kernel.org>
	<2558832d-c821-436d-898d-b708c5e0a228@nabladev.com>
	<20260412105125.48f0c58f@kernel.org>
	<20260413125744.TVKkZcEK@linutronix.de>
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On Mon, 13 Apr 2026 14:57:44 +0200 Sebastian Andrzej Siewior wrote:
> On 2026-04-12 10:51:25 [-0700], Jakub Kicinski wrote:
> > > Does the backtrace make the problem clearer, with the annotation abov=
e ? =20
> >=20
> > Sebastian, do you have any recommendation here? tl;dr is that the drive=
r does =20
> =E2=80=A6
>=20
> What about this:

Thanks for taking a look (according to you auto-reply immediately after
a vacation ;))

TBH changing the driver feels like a workaround / invitation for a
whack-a-mole game. I'd prefer to fix the skb allocation.
Is there any way we can check if any locks which were _irq() on non-RT
are held?