linux-kernel - Re: [PATCH v2 2/2] PCI: pciehp: Prevent deadlock on disconnect

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Message-ID: <20190923053403.jdjw6ed3sub6iuou@wunner.de>
Date:   Mon, 23 Sep 2019 07:34:03 +0200
From:   Lukas Wunner <lukas@...ner.de>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Keith Busch <keith.busch@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Frederick Lawler <fred@...dlawl.com>,
        "Gustavo A . R . Silva" <gustavo@...eddedor.com>,
        Sinan Kaya <okaya@...nel.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] PCI: pciehp: Prevent deadlock on disconnect

On Mon, Aug 12, 2019 at 05:31:33PM +0300, Mika Westerberg wrote:
> If there are more than one PCIe switch with hotplug downstream ports
> hot-removing them leads to a following deadlock:

For the record, I think my comments on v1 of this patch still apply:

https://patchwork.ozlabs.org/patch/1117870/#2230798