[PATCH] drm/scheduler: signal scheduled fence when kill job

[Philipp Stanner]

On Thu, 2025-05-15 at 10:48 +0200, Christian König wrote:
> Explicitly adding the scheduler maintainers.
> 
> On 5/15/25 04:07, Lin.Cao wrote:
> > Previously we only signaled finished fence which may cause some
> > submission's dependency cannot be cleared the cause benchmark hang.
> > Signal both scheduled fence and finished fence could fix this
> > issue.

Code seems legit to me; but be so kind and also pimp up the commit
message a bit, Christian. It's not very clear what the bug is and why
setting the parent to NULL solves it. Or is the issue simply that the
fence might be dropped unsignaled, being a bug by definition? Needs to
be written down.

Grammar is also a bit too broken.

And running the unit tests before pushing is probably also a good idea.

> > 
> > Signed-off-by: Lin.Cao <lincao12 at amd.com>

Acked-by: Philipp Stanner <phasta at kernel.org>

> 
> Reviewed-by: Christian König <christian.koenig at amd.com>
> 
> Danilo & Philipp can we quickly get an rb for that? I'm volunteering
> to push it to drm-misc-fixes and add the necessary stable tags since
> this is a fix for a rather ugly bug.
> 
> Regards,
> Christian.
> 
> 
> > ---
> >  drivers/gpu/drm/scheduler/sched_entity.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/gpu/drm/scheduler/sched_entity.c
> > b/drivers/gpu/drm/scheduler/sched_entity.c
> > index bd39db7bb240..e671aa241720 100644
> > --- a/drivers/gpu/drm/scheduler/sched_entity.c
> > +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> > @@ -176,6 +176,7 @@ static void
> > drm_sched_entity_kill_jobs_work(struct work_struct *wrk)
> >  {
> >  	struct drm_sched_job *job = container_of(wrk,
> > typeof(*job), work);
> >  
> > +	drm_sched_fence_scheduled(job->s_fence, NULL);
> >  	drm_sched_fence_finished(job->s_fence, -ESRCH);
> >  	WARN_ON(job->s_fence->parent);
> >  	job->sched->ops->free_job(job);
>