Re: [PATCH 2/7] rust: drm: gem: gate open/close callbacks with RegistrationGuard

[Alice Ryhl]

On Sat, Aug 15, 2026 at 01:09:00AM +0200, Danilo Krummrich wrote:
> Wrap the GEM object open and close callbacks with a RegistrationGuard
> (drm_dev_enter / drm_dev_exit) to ensure the driver callbacks only run
> while the parent bus device is bound.
> 
> If the device has been unbound, open returns -ENODEV and close silently
> returns. This prevents driver code from accessing device resources after
> unbind and is a prerequisite for making drm::Driver::File
> lifetime-parameterized, since GEM callbacks receive a &drm::File that
> could otherwise be used to access invalidated file private data.
> 
> Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>

Reviewed-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>