[PATCH] drm/i915/selftests: Properly reset mock object propers for each test

[Daniel Vetter]

On Thu, Oct 21, 2021 at 10:20:48PM +0200, Daniel Vetter wrote:
> I forgot to do this properly in
> 
> commit 6f11f37459d8f9f74ff1c299c0bedd50b458057a
> Author: Daniel Vetter <daniel.vetter at ffwll.ch>
> Date:   Fri Jul 23 10:34:55 2021 +0200
> 
>     drm/plane: remove drm_helper_get_plane_damage_clips
> 
> intel-gfx CI didn't spot this because we run each selftest in each own
> invocations, which means reloading i915.ko. But if you just run all
> the selftests in one go at boot-up, then it falls apart and eventually
> we cross over the hardcoded limited of how many properties can be
> attached to a single object.
> 
> Fix this by resetting the property count. Nothing else to clean up
> since it's all static storage anyway.
> 
> Reported-and-tested-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
> Cc: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
> Fixes: 6f11f37459d8 ("drm/plane: remove drm_helper_get_plane_damage_clips")
> Cc: José Roberto de Souza <jose.souza at intel.com>
> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
> Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> Cc: Hans de Goede <hdegoede at redhat.com>
> Cc: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Cc: Maxime Ripard <mripard at kernel.org>
> Cc: Thomas Zimmermann <tzimmermann at suse.de>
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>

Merged to drm-misc-fixes with Thomas' irc ack. Will unfortunately miss
this -rc since the drm pull train left the station already, but it'll be
there in a week.
-Daniel

> ---
>  drivers/gpu/drm/selftests/test-drm_damage_helper.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/selftests/test-drm_damage_helper.c b/drivers/gpu/drm/selftests/test-drm_damage_helper.c
> index 1c19a5d3eefb..8d8d8e214c28 100644
> --- a/drivers/gpu/drm/selftests/test-drm_damage_helper.c
> +++ b/drivers/gpu/drm/selftests/test-drm_damage_helper.c
> @@ -30,6 +30,7 @@ static void mock_setup(struct drm_plane_state *state)
>  	mock_device.driver = &mock_driver;
>  	mock_device.mode_config.prop_fb_damage_clips = &mock_prop;
>  	mock_plane.dev = &mock_device;
> +	mock_obj_props.count = 0;
>  	mock_plane.base.properties = &mock_obj_props;
>  	mock_prop.base.id = 1; /* 0 is an invalid id */
>  	mock_prop.dev = &mock_device;
> -- 
> 2.33.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch