linux-kernel - Re: "irq/matrix: Spread interrupts on allocation" breaks nouveau in mainline kernel

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Message-ID: <alpine.DEB.2.20.1801241351080.1997@nanos>
Date:   Wed, 24 Jan 2018 13:52:10 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Lyude Paul <lyude@...hat.com>
cc:     hpa@...or.com, keith.busch@...el.com, mingo@...nel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: "irq/matrix: Spread interrupts on allocation" breaks nouveau in
 mainline kernel

On Tue, 23 Jan 2018, Lyude Paul wrote:

> JFYI: I confirmed this patch is definitely broken. I'm seeing nouveau get
> assigned the same MSI vector as another device on the system, which would
> explain why interrupts suddenly stop working. I'll keep looking into it further
> tomorrow.

How did you determine that it is the same MSI vector as another device?

Thanks,

	tglx