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

[Daniel Vetter]

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>
---
 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