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[v2,11/11] drm/sched: Check locking in drm_sched_job_await_implicit

Message ID 20210702213815.2249499-12-daniel.vetter@ffwll.ch (mailing list archive)
State New, archived
Headers show
Series drm/scheduler dependency tracking | expand

Commit Message

Daniel Vetter July 2, 2021, 9:38 p.m. UTC
You really need to hold the reservation here or all kinds of funny
things can happen between grabbing the dependencies and inserting the
new fences.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: "Christian K├Ânig" <christian.koenig@amd.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Luben Tuikov <luben.tuikov@amd.com>
Cc: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Jack Zhang <Jack.Zhang1@amd.com>
 drivers/gpu/drm/scheduler/sched_main.c | 2 ++
 1 file changed, 2 insertions(+)
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diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index de76f7e14e0d..47f869aff335 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -705,6 +705,8 @@  int drm_sched_job_await_implicit(struct drm_sched_job *job,
 	struct dma_fence **fences;
 	unsigned int i, fence_count;
+	dma_resv_assert_held(obj->resv);
 	if (!write) {
 		struct dma_fence *fence = dma_resv_get_excl_unlocked(obj->resv);