If it does, someone managed to set up a sched_entity without schedulers, which is just a driver bug. We BUG_ON() here because in the next patch drm_sched_job_init() will be split up, with drm_sched_job_arm() never failing. And that's the part where the rq selection will end up in. Note that if having an empty sched_list set on an entity is indeed a valid use-case, we can keep that check in job_init even after the split into job_init/arm. Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx> Cc: "Christian König" <christian.koenig@xxxxxxx> Cc: Luben Tuikov <luben.tuikov@xxxxxxx> Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> Cc: Steven Price <steven.price@xxxxxxx> Cc: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx> Cc: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx> Cc: Jack Zhang <Jack.Zhang1@xxxxxxx> --- drivers/gpu/drm/scheduler/sched_entity.c | 2 +- drivers/gpu/drm/scheduler/sched_main.c | 3 +-- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c index 79554aa4dbb1..6fc116ee7302 100644 --- a/drivers/gpu/drm/scheduler/sched_entity.c +++ b/drivers/gpu/drm/scheduler/sched_entity.c @@ -45,7 +45,7 @@ * @guilty: atomic_t set to 1 when a job on this queue * is found to be guilty causing a timeout * - * Note: the sched_list should have at least one element to schedule + * Note: the sched_list must have at least one element to schedule * the entity * * Returns 0 on success or a negative error code on failure. diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c index 33c414d55fab..01dd47154181 100644 --- a/drivers/gpu/drm/scheduler/sched_main.c +++ b/drivers/gpu/drm/scheduler/sched_main.c @@ -586,8 +586,7 @@ int drm_sched_job_init(struct drm_sched_job *job, struct drm_gpu_scheduler *sched; drm_sched_entity_select_rq(entity); - if (!entity->rq) - return -ENOENT; + BUG_ON(!entity->rq); sched = entity->rq->sched; -- 2.32.0
