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Sender: Guenter Roeck <groeck7@gmail.com>
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Date:   Mon, 31 Jan 2022 07:21:40 -0800
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To:     Thomas Gleixner <tglx@linutronix.de>
Cc:     LKML <linux-kernel@vger.kernel.org>, Nishanth Menon <nm@ti.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Stuart Yoder <stuyoder@gmail.com>,
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        Jassi Brar <jassisinghbrar@gmail.com>,
        Sinan Kaya <okaya@kernel.org>,
        iommu@lists.linux-foundation.org,
        Peter Ujfalusi <peter.ujfalusi@gmail.com>,
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        Bjorn Helgaas <bhelgaas@google.com>,
        Megha Dey <megha.dey@intel.com>,
        Juergen Gross <jgross@suse.com>,
        Tero Kristo <kristo@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Vinod Koul <vkoul@kernel.org>, Marc Zygnier <maz@kernel.org>,
        dmaengine@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
References: <87mtjc2lhe.ffs@tglx>
From:   Guenter Roeck <linux@roeck-us.net>
Subject: Re: [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity()
In-Reply-To: <87mtjc2lhe.ffs@tglx>
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On 1/31/22 03:27, Thomas Gleixner wrote:
> On Sun, Jan 30 2022 at 09:12, Guenter Roeck wrote:
>> On Fri, Dec 10, 2021 at 11:19:26PM +0100, Thomas Gleixner wrote:
>> This patch results in the following runtime warning when booting x86
>> (32 bit) nosmp images from NVME in qemu.
>>
>> [   14.825482] nvme nvme0: 1/0/0 default/read/poll queues
>> ILLOPC: ca7c6d10: 0f 0b
>> [   14.826188] ------------[ cut here ]------------
>> [   14.826307] WARNING: CPU: 0 PID: 7 at drivers/pci/msi/msi.c:1114 pci_irq_get_affinity+0x80/0x90
> 
> This complains about msi_desc->affinity being NULL.
> 
>> git bisect bad f48235900182d64537c6e8f8dc0932b57a1a0638
>> # first bad commit: [f48235900182d64537c6e8f8dc0932b57a1a0638] PCI/MSI: Simplify pci_irq_get_affinity()
> 
> Hrm. Can you please provide dmesg and /proc/interrupts from a
> kernel before that commit?
> 

Sure. Please see http://server.roeck-us.net/qemu/x86/.
The logs are generated with with v5.16.4.

Guenter