Re: [PATCH v1] driver: base: Add driver filter support

On Thu, Aug 05, 2021 at 12:18:12PM -0700, Dan Williams wrote:

On Thu, Aug 5, 2021 at 12:12 PM Greg Kroah-Hartman
[off-list ref] wrote:

quoted

On Thu, Aug 05, 2021 at 11:53:52AM -0700, Kuppuswamy, Sathyanarayanan wrote:

quoted

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.

Not your fault, I'm more amazed that Andi doesn't remember this, he's
been around longer :)

But the first instinct should not be "let's go add a new feature", but
rather, "how has this problem been solved by others first" because,
really, this is not a new issue at all.  You should not rely on just me
to point out existing kernel features, we do have documentation you
know...

thanks,

greg k-h