linux-kernel - Re: [PATCH v1] driver: base: Add driver filter support

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Message-ID: <CAPcyv4gV9GK93rgtoHxhshzDGk0ueJn0d9LXYitJ8=wJWzmWHg@mail.gmail.com>
Date:   Thu, 5 Aug 2021 12:18:12 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>
Subject: Re: [PATCH v1] driver: base: Add driver filter support

On Thu, Aug 5, 2021 at 12:12 PM Greg Kroah-Hartman
<gregkh@...uxfoundation.org> wrote:
>
> On Thu, Aug 05, 2021 at 11:53:52AM -0700, Kuppuswamy, Sathyanarayanan wrote:
> > I am not sure how USB and Thunderbolt "authorzied" model works. But I
> > don't think it prevents built-in driver probes during kernel boot right?
>
> Yes it does.
>
> Again Intel created this framework well over a decade ago for busses
> that it deemed that it did not want to "trust" to instantly probe
> drivers for and made it part of the Wireless USB specification.
>
> Then Intel went and added the same framework to Thunderbolt for the same
> reason.
>
> To ignore this work is quite odd, you might want to talk to your
> coworkers...

Sometimes we need upstream to connect us wayward drones back into the
hive mind. Forgive me for not immediately recognizing that the
existing 'authorized' mechanisms might be repurposed for this use
case.