linux-kernel - Re: request_irq() usage in wm8350_register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <f1f8125f-1139-4fc5-b0c7-a3123758c9de@sirena.org.uk>
Date: Wed, 21 Jan 2026 15:03:58 +0000
From: Mark Brown <broonie@...nel.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Richard Fitzgerald <rf@...nsource.cirrus.com>,
	patches@...nsource.cirrus.com, linux-kernel@...r.kernel.org,
	Lee Jones <lee@...nel.org>
Subject: Re: request_irq() usage in wm8350_register_irq().

On Wed, Jan 21, 2026 at 02:45:08PM +0100, Sebastian Andrzej Siewior wrote:
> On 2026-01-21 13:37:09 [+0000], Mark Brown wrote:

> > The chip is only accessable via I2C or SPI so the primary interrupt
> > handler is itself always running and reporting child interrupts in
> > threaded context.  They can't really deliver a hardirq context
> > interrupt.

> In that case it lacks the needed IRQF_ONEHOST flag and nobody noticed
> that request_irq() fails for a few years now. I add a patch to my
> stack…

Thanks.

Download attachment "signature.asc" of type "application/pgp-signature" (489 bytes)