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Date:   Wed, 01 Mar 2023 09:01:27 +0100
From:   "Arnd Bergmann" <arnd@arndb.de>
To:     "Larry Finger" <Larry.Finger@lwfinger.net>,
        "Arnd Bergmann" <arnd@kernel.org>,
        "Dominik Brodowski" <linux@dominikbrodowski.net>,
        linux-kernel@vger.kernel.org
Cc:     "Bjorn Helgaas" <bhelgaas@google.com>,
        "Florian Fainelli" <f.fainelli@gmail.com>,
        "Hartley Sweeten" <hsweeten@visionengravers.com>,
        "Ian Abbott" <abbotti@mev.co.uk>,
        "Jakub Kicinski" <kuba@kernel.org>,
        "Kevin Cernekee" <cernekee@gmail.com>,
        "Lukas Wunner" <lukas@wunner.de>,
        "Manuel Lauss" <manuel.lauss@gmail.com>,
        "Oliver Hartkopp" <socketcan@hartkopp.net>,
        "Olof Johansson" <olof@lixom.net>,
        "Robert Jarzmik" <robert.jarzmik@free.fr>,
        "YOKOTA Hiroshi" <yokota@netlab.is.tsukuba.ac.jp>,
        bcm-kernel-feedback-list@broadcom.com,
        linux-arm-kernel@lists.infradead.org, linux-can@vger.kernel.org,
        linux-mips@vger.kernel.org, linux-pci@vger.kernel.org,
        linux-wireless@vger.kernel.org, Netdev <netdev@vger.kernel.org>
Subject: Re: [RFC 0/6] pcmcia: separate 16-bit support from cardbus
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On Wed, Mar 1, 2023, at 02:13, Larry Finger wrote:
> On 2/28/23 02:37, Arnd Bergmann wrote:
>> My intention was to keep Cardbus support working with old defconfig files,
>> and I've not moved CONFIG_CARDBUS into a separate submenu between
>> CONFIG_PCI_HOTPLUG and CONFIG_PCI_CONTROLLER but left the driver in
>> drivers/pci/hotplug. I think that's the best compromise here, but maybe
>> the PCI maintainers have a better idea.
>
> I did a bit more investigation. My original .config had CONFIG_PCI_HOTPLUG not 
> defined, but did have CONFIG_CARDBUS and the various yenta modules turned on. 
> With your changes, the CONFIG_PCI_HOTPLUG overrode CARDBUS.
>
> I thought mine was a corner case, but now I am not sure. As stated above, the 
> Debian 12 factory configuration for ppc32 does not turn on PCI hotplug, but the 
> x86_64 configuration for openSUSE Tumbleweed does. The x86_64 configuration in 
> Fedora 37 does not contain CONFIG_PCI_HOTPLUG, but does have CARDBUS set.
>
> It seems that several distros may get the wrong result with this change,

As far as I can tell, this should work with the changes I described
above, since CONFIG_CARDBUS no longer depends on CONFIG_PCI_HOTPLUG.
I now uploaded the changed version to

https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/log/?h=pccard-rework-2

    Arnd