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 > <gregkh@xxxxxxxxxxxxxxxxxxx> 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. 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
