[Intel-xe] [PATCH v4 06/10] drm/sched: Add drm_sched_start_timeout_unlocked helper

[Luben Tuikov]

Hi,

On 2023-09-19 01:01, Matthew Brost wrote:
> Also add a lockdep assert to drm_sched_start_timeout.
> 
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>

Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>

Thanks for this patch!

> ---
>  drivers/gpu/drm/scheduler/sched_main.c | 23 +++++++++++++----------
>  1 file changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 1e21d234fb5c..09ef07b9e9d5 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -431,11 +431,20 @@ static void drm_sched_job_done_cb(struct dma_fence *f, struct dma_fence_cb *cb)
>   */
>  static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched)
>  {
> +	lockdep_assert_held(&sched->job_list_lock);
> +
>  	if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
>  	    !list_empty(&sched->pending_list))
>  		queue_delayed_work(sched->timeout_wq, &sched->work_tdr, sched->timeout);
>  }
>  
> +static void drm_sched_start_timeout_unlocked(struct drm_gpu_scheduler *sched)
> +{
> +	spin_lock(&sched->job_list_lock);
> +	drm_sched_start_timeout(sched);
> +	spin_unlock(&sched->job_list_lock);
> +}
> +
>  /**
>   * drm_sched_fault - immediately start timeout handler
>   *
> @@ -548,11 +557,8 @@ static void drm_sched_job_timedout(struct work_struct *work)
>  		spin_unlock(&sched->job_list_lock);
>  	}
>  
> -	if (status != DRM_GPU_SCHED_STAT_ENODEV) {
> -		spin_lock(&sched->job_list_lock);
> -		drm_sched_start_timeout(sched);
> -		spin_unlock(&sched->job_list_lock);
> -	}
> +	if (status != DRM_GPU_SCHED_STAT_ENODEV)
> +		drm_sched_start_timeout_unlocked(sched);
>  }
>  
>  /**
> @@ -678,11 +684,8 @@ void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
>  			drm_sched_job_done(s_job, -ECANCELED);
>  	}
>  
> -	if (full_recovery) {
> -		spin_lock(&sched->job_list_lock);
> -		drm_sched_start_timeout(sched);
> -		spin_unlock(&sched->job_list_lock);
> -	}
> +	if (full_recovery)
> +		drm_sched_start_timeout_unlocked(sched);
>  
>  	drm_sched_submit_start(sched);
>  }

-- 
Regards,
Luben