linux-kernel - Re: [PATCH 17/21] mfd: wm8350-core: Use IRQF

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Message-ID: <aXOLS_ZP7o0xaHII@smile.fi.intel.com>
Date: Fri, 23 Jan 2026 16:52:59 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
	Thomas Gleixner <tglx@...nel.org>, Lee Jones <lee@...nel.org>,
	patches@...nsource.cirrus.com, Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH 17/21] mfd: wm8350-core: Use IRQF_ONESHOT

On Fri, Jan 23, 2026 at 12:37:03PM +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 a

"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.

...

> Cc: Lee Jones <lee@...nel.org>
> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Cc: patches@...nsource.cirrus.com
> Cc: Mark Brown <broonie@...nel.org>

Cc list can be moved out from the commit message.

-- 
With Best Regards,
Andy Shevchenko