linux-kernel - Re: [Patch v4 10/10] i2x: pnx: Use threaded irq to fix warning from del_timer

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Date: Fri, 21 Jun 2024 00:57:21 +0200
From: Andi Shyti <andi.shyti@...nel.org>
To: Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>
Cc: Vinod Koul <vkoul@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	"J.M.B. Downing" <jonathan.downing@...tel.com>, Vladimir Zapolskiy <vz@...ia.com>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Russell King <linux@...linux.org.uk>, Michael Turquette <mturquette@...libre.com>, 
	Stephen Boyd <sboyd@...nel.org>, Miquel Raynal <miquel.raynal@...tlin.com>, 
	Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, 
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>, Arnd Bergmann <arnd@...db.de>, 
	Yangtao Li <frank.li@...o.com>, Li Zetao <lizetao1@...wei.com>, 
	Chancel Liu <chancel.liu@....com>, Michael Ellerman <mpe@...erman.id.au>, dmaengine@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org, 
	linux-sound@...r.kernel.org, linux-clk@...r.kernel.org, linux-i2c@...r.kernel.org, 
	linux-mtd@...ts.infradead.org, Markus Elfring <Markus.Elfring@....de>
Subject: Re: [Patch v4 10/10] i2x: pnx: Use threaded irq to fix warning from
 del_timer_sync()

Hi Piotr,

On Thu, Jun 20, 2024 at 07:56:41PM GMT, Piotr Wojtaszczyk wrote:
> When del_timer_sync() is called in an interrupt context it throws a warning
> because of potential deadlock. Threaded irq handler fixes the potential
> problem.
> 
> Signed-off-by: Piotr Wojtaszczyk <piotr.wojtaszczyk@...esys.com>

did you run into a lockdep splat?

Anything against using del_timer(), instead? Have you tried?

Thanks,
Andi