linux-kernel - Re: [PATCH v2 15/20] mfd: wm8350-core: Use IRQF

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Message-ID: <aXoJ9JIYINR_KXro@smile.fi.intel.com>
Date: Wed, 28 Jan 2026 15:07:00 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...nel.org>,
	Charles Keepax <ckeepax@...nsource.cirrus.com>,
	Lee Jones <lee@...nel.org>, patches@...nsource.cirrus.com,
	Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v2 15/20] mfd: wm8350-core: Use IRQF_ONESHOT

On Wed, Jan 28, 2026 at 10:55:35AM +0100, Sebastian Andrzej Siewior wrote:
> Using a threaded interrupt without a dedicated primary handler mandates
> the IRQF_ONESHOT flag to mask the interrupt source while the threaded
> handler is active. Otherwise the interrupt can fire again before the
> threaded handler had a chance to run.
> 
> Mark explained that this should not happen with this hardware since it
> is a slow irqchip which is behind an I2C/ SPI bus but the IRQ-core will
> refuse to accept such a handler.
> 
> Set IRQF_ONESHOT so the interrupt source is masked until the secondary
> handler is done.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

-- 
With Best Regards,
Andy Shevchenko