drm/sched: Create a fake device for KUnit tests

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The DRM scheduler KUnit tests pass NULL for the dev field in
drm_sched_init_args, which NULL-pointer dereferences in the drm_sched_job
trace event via dev_name() on sched->dev.

Give the mock scheduler a device with kunit_device_register(), which is
also cleaned up at test exit. A per-function counter keeps the device
names unique, since some tests create several mock schedulers.

Fixes: 5a99350794 ("drm/sched: Add scheduler unit testing infrastructure and some basic tests")
Cc: stable@vger.kernel.org
Signed-off-by: Shixiong Ou <oushixiong@kylinos.cn>
Acked-by: Maxime Ripard <mripard@kernel.org>
[phasta: removed static variable init to 0 again]
Signed-off-by: Philipp Stanner <phasta@kernel.org>
Link: https://patch.msgid.link/20260908055941.351486-1-oushixiong1025@163.com

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Shixiong Ou 2026-09-08 13:59:41 +08:00 • committed by Philipp Stanner

parent a8916759a4

commit 28cc4d5a75

1 changed files with 11 additions and 0 deletions

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drivers/gpu/drm/scheduler/tests/mock_scheduler.c

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