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.
v2: Fix commit summary (Christian)
Acked-by: Melissa Wen mwen@igalia.com Reviewed-by: "Christian König" christian.koenig@amd.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com Cc: "Christian König" 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 --- drivers/gpu/drm/scheduler/sched_main.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 157d4cf360f8..ba121f87cd2e 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -708,6 +708,8 @@ int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job, struct dma_fence *fence; int ret;
+ dma_resv_assert_held(obj->resv); + dma_resv_for_each_fence(&cursor, obj->resv, write, fence) { /* Make sure to grab an additional ref on the added fence */ dma_fence_get(fence);