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

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Message-ID: <3c29d829-0068-7135-ccf8-1a254e1fa253@kernel.org>
Date:   Mon, 19 Aug 2019 08:28:19 -0400
From:   Sinan Kaya <okaya@...nel.org>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Lukas Wunner <lukas@...ner.de>,
        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>,
        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 8/19/2019 4:56 AM, Mika Westerberg wrote:
>> There are PCI controllers that won't report presence detect correctly,
>> but still report link active.
> If that's the case then pciehp_card_present() returns false so we call
> pciehp_check_link_active() which should work with those controllers.
> 
> What I'm missing here?
> 

You are right. I thought we'd somehow prematurely leave the function.
That's not the case.