linux-kernel - Re: [PATCH v1 0/2] PCI: hotplug: Add checks to avoid doing hotplug on PCIe Upstream Ports

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Message-ID: <20221122180603.GA205176@bhelgaas>
Date:   Tue, 22 Nov 2022 12:06:03 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Lukas Wunner <lukas@...ner.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: Re: [PATCH v1 0/2] PCI: hotplug: Add checks to avoid doing hotplug
 on PCIe Upstream Ports

On Mon, Nov 21, 2022 at 07:13:15PM +0100, Rafael J. Wysocki wrote:
> Hi All,
> 
> PCIe Upstream Ports are not hotplug-capable by definition, but it turns out
> that in some cases, if the system is configured in a particularly interesting
> way, the kernel may be made attempt to operate an Upstream Port as a hotplug
> one which causes functional issues to appear.
> 
> The following 2 patches amend the code to prevent this behavior from occurring.

Thanks, applied to pci/hotplug for v6.2.  Lukas, I didn't presume to
convert your LGTM to Reviewed-by, but would be happy add it.

Bjorn