linux-kernel - Re: [PATCH] ASoC: meson: axg-fifo: fix irq scheduling issue with PREEMPT

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20240813152243.2H3-mnx5@linutronix.de>
Date: Tue, 13 Aug 2024 17:22:43 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: Mark Brown <broonie@...nel.org>
Cc: Liam Girdwood <lgirdwood@...il.com>,
	Jerome Brunet <jbrunet@...libre.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	linux-amlogic@...ts.infradead.org, alsa-devel@...a-project.org,
	linux-kernel@...r.kernel.org,
	Arseniy Krasnov <avkrasnov@...utedevices.com>
Subject: Re: [PATCH] ASoC: meson: axg-fifo: fix irq scheduling issue with
 PREEMPT_RT

On 2024-08-13 15:43:54 [+0100], Mark Brown wrote:
> On Tue, 06 Aug 2024 12:27:03 +0200, Jerome Brunet wrote:
> > With PREEMPT_RT enabled, spinlocks become preemptible.
> > This is usually not a problem with spinlocks used in IRQ context since
> > IRQ handlers get threaded. However, if IRQF_ONESHOT is set, the upper half
> > of a threaded irq handler won't be threaded and this causes scheduling
> > problems if spinlocks are used in the upper half, like with regmap when
> > '.fast_io' is set.
> > 
> > [...]
> 
> Applied to
> 
>    https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
> 
> Thanks!
> 
> [1/1] ASoC: meson: axg-fifo: fix irq scheduling issue with PREEMPT_RT
>       commit: 5003d0ce5c7da3a02c0aff771f516f99731e7390

Didn't you already apply v2 of this?

Sebastian