Re: [PATCH 05/24] drm/tests: helpers: Make sure the device is bound

Javier Martinez Canillas
2022-11-25T10:20:45Z

> The device managed resources are freed when the device is detached, so
> it has to be bound in the first place.
>
> Let's create a fake driver that we will bind to our fake device to
> benefit from the device managed cleanups in our tests.
>
> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
> ---
> drivers/gpu/drm/tests/drm_kunit_helpers.c | 60 +++++++++++++++++++++++++++++++
> 1 file changed, 60 insertions(+)
>

If I understood the platform core code correctly, the probe is always sync in
the case of platform drivers. Unless .probe_type = PROBE_PREFER_ASYNCHRONOUS is
set or a module is loaded using with the "async_probe=1" parameter. So I believe
the wait queue won't be needed. The only DRM driver that forces an async probe is
drivers/gpu/drm/hyperv/hyperv_drm_drv.c AFAICT.

So I would drop this patch from the set for now.