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

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Date:   Mon, 21 Nov 2022 19:13:15 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Bjorn Helgaas <helgaas@...nel.org>
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: [PATCH v1 0/2] PCI: hotplug: Add checks to avoid doing hotplug on PCIe Upstream Ports

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!