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From:   Thomas Gleixner <tglx@linutronix.de>
To:     Guenter Roeck <linux@roeck-us.net>
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Subject: Re: [patch V3 28/35] PCI/MSI: Simplify pci_irq_get_affinity()
In-Reply-To: <20220130171210.GA3545402@roeck-us.net>
Date:   Mon, 31 Jan 2022 12:27:57 +0100
Message-ID: <87mtjc2lhe.ffs@tglx>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

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?

Thanks,

        tglx