linux-kernel - Re: [PATCH v1] irq: Set IRQF_COND_ONESHOT in request

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Message-ID: <877cdru0tm.ffs@tglx>
Date: Thu, 11 Jul 2024 22:32:21 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: LKML <linux-kernel@...r.kernel.org>, Linux ACPI
 <linux-acpi@...r.kernel.org>, Stefan Seyfried
 <stefan.seyfried@...glemail.com>
Subject: Re: [PATCH v1] irq: Set IRQF_COND_ONESHOT in request_irq()

On Thu, Jul 11 2024 at 12:20, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> The callers of request_irq() don't care about IRQF_ONESHOT because they
> don't provide threaded handlers, but if they happen to share the IRQ
> with the ACPI SCI, which has a threaded handler and sets IRQF_ONESHOT,
> request_irq() will fail for them due to a flags mismatch.
>
> Address this by making request_irq() add IRQF_COND_ONESHOT to the flags
> passed to request_threaded_irq() for all of its callers.

In principle that should work. We'll see whether there are dragons
lurking :)

Thanks,

        tglx