drm/scheduler: Job timeout handler returns status (v3)

This patch does not change current behaviour.

The driver's job timeout handler now returns
status indicating back to the DRM layer whether
the device (GPU) is no longer available, such as
after it's been unplugged, or whether all is
normal, i.e. current behaviour.

All drivers which make use of the
drm_sched_backend_ops' .timedout_job() callback
have been accordingly renamed and return the
would've-been default value of
DRM_GPU_SCHED_STAT_NOMINAL to restart the task's
timeout timer--this is the old behaviour, and is
preserved by this patch.

v2: Use enum as the status of a driver's job
    timeout callback method.

v3: Return scheduler/device information, rather
    than task information.

Cc: Alexander Deucher <[email protected]>
Cc: Andrey Grodzovsky <[email protected]>
Cc: Christian König <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Lucas Stach <[email protected]>
Cc: Russell King <[email protected]>
Cc: Christian Gmeiner <[email protected]>
Cc: Qiang Yu <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Tomeu Vizoso <[email protected]>
Cc: Steven Price <[email protected]>
Cc: Alyssa Rosenzweig <[email protected]>
Cc: Eric Anholt <[email protected]>
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Luben Tuikov <[email protected]>
Acked-by: Alyssa Rosenzweig <[email protected]>
Acked-by: Christian König <[email protected]>
Acked-by: Steven Price <[email protected]>
Signed-off-by: Christian König <[email protected]>
Link: https://patchwork.freedesktop.org/patch/415095/

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 63b4c5643f9c..6e4273852712 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -415,7 +415,7 @@ out:
 	mutex_unlock(&dev->error_task_list_lock);
 }
 
-static void lima_sched_timedout_job(struct drm_sched_job *job)
+static enum drm_gpu_sched_stat lima_sched_timedout_job(struct drm_sched_job *job)
 {
 	struct lima_sched_pipe *pipe = to_lima_pipe(job->sched);
 	struct lima_sched_task *task = to_lima_task(job);
@@ -449,6 +449,8 @@ static void lima_sched_timedout_job(struct drm_sched_job *job)
 
 	drm_sched_resubmit_jobs(&pipe->base);
 	drm_sched_start(&pipe->base, true);
+
+	return DRM_GPU_SCHED_STAT_NOMINAL;
 }
 
 static void lima_sched_free_job(struct drm_sched_job *job)