Re: [PATCH v2 1/6] driver core: Move the "authorized" attribute from USB/Thunderbolt to core

[Yehezkel Bernat]

On Thu, Sep 30, 2021 at 6:28 PM Dan Williams <dan.j.williams@xxxxxxxxx> wrote:
>
> On Thu, Sep 30, 2021 at 4:20 AM Yehezkel Bernat <yehezkelshb@xxxxxxxxx> wrote:
> >
> > On Thu, Sep 30, 2021 at 4:05 AM Kuppuswamy Sathyanarayanan
> > <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
> > >
> > > no functional
> > > changes other than value 2 being not visible to the user.
> > >
> >
> > Are we sure we don't break any user-facing tool with it? Tools might use this to
> > "remember" how the device was authorized this time.
>
> That's why it was highlighted in the changelog. Hopefully a
> Thunderbolt developer can confirm if it is a non-issue.
> Documentation/ABI/testing/sysfs-bus-thunderbolt does not seem to
> answer this question about whether authorized_show and
> authorized_store need to be symmetric.

Apparently, Bolt does read it [1] and cares about it [2].

[1] https://gitlab.freedesktop.org/bolt/bolt/-/blob/130e09d1c7ff02c09e4ad1c9c36e9940b68e58d8/boltd/bolt-sysfs.c#L511
[2] https://gitlab.freedesktop.org/bolt/bolt/-/blob/130e09d1c7ff02c09e4ad1c9c36e9940b68e58d8/boltd/bolt-device.c#L639