linux-kernel - Re: [PATCH] PCI: dwc: layerscape: convert to builtin_platform

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Message-ID: <c3e35b90e173b15870a859fd7001a712@walle.cc>
Date:   Wed, 20 Jan 2021 20:28:36 +0100
From:   Michael Walle <michael@...le.cc>
To:     Saravana Kannan <saravanak@...gle.com>
Cc:     Rob Herring <robh@...nel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        PCI <linux-pci@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel@...r.kernel.org,
        Minghuan Lian <minghuan.Lian@....com>,
        Mingkai Hu <mingkai.hu@....com>, Roy Zang <roy.zang@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] PCI: dwc: layerscape: convert to
 builtin_platform_driver()

[RESEND, fat-fingered the buttons of my mail client and converted
all CCs to BCCs :(]

Am 2021-01-20 20:02, schrieb Saravana Kannan:
> On Wed, Jan 20, 2021 at 6:24 AM Rob Herring <robh@...nel.org> wrote:
>> 
>> On Wed, Jan 20, 2021 at 4:53 AM Michael Walle <michael@...le.cc> 
>> wrote:
>> >
>> > fw_devlink will defer the probe until all suppliers are ready. We can't
>> > use builtin_platform_driver_probe() because it doesn't retry after probe
>> > deferral. Convert it to builtin_platform_driver().
>> 
>> If builtin_platform_driver_probe() doesn't work with fw_devlink, then
>> shouldn't it be fixed or removed?
> 
> I was actually thinking about this too. The problem with fixing
> builtin_platform_driver_probe() to behave like
> builtin_platform_driver() is that these probe functions could be
> marked with __init. But there are also only 20 instances of
> builtin_platform_driver_probe() in the kernel:
> $ git grep ^builtin_platform_driver_probe | wc -l
> 20
> 
> So it might be easier to just fix them to not use
> builtin_platform_driver_probe().
> 
> Michael,
> 
> Any chance you'd be willing to help me by converting all these to
> builtin_platform_driver() and delete builtin_platform_driver_probe()?

If it just moving the probe function to the _driver struct and
remove the __init annotations. I could look into that.

-michael