[PATCH v2 8/8] drm/panfrost: Use DRM_GPU_SCHED_STAT_NO_HANG to skip the reset

[Maíra Canal]

Panfrost can skip the reset if TDR has fired before the free-job worker.
Currently, since Panfrost doesn't take any action on these scenarios, the
job is being leaked, considering that `free_job()` won't be called.

To avoid such leaks, use the DRM_GPU_SCHED_STAT_NO_STAT status to skip the
reset and re-arm the timer.

Signed-off-by: Maíra Canal <mcanal at igalia.com>
Reviewed-by: Steven Price <steven.price at arm.com>
---
 drivers/gpu/drm/panfrost/panfrost_job.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index afcffe7f8fe9e11f84e4ab7e8f5a72f7bf583690..842e012cdc68e130a13e08ffae3b7fdf5f8e1acc 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -751,11 +751,11 @@ static enum drm_gpu_sched_stat panfrost_job_timedout(struct drm_sched_job
 	int js = panfrost_job_get_slot(job);
 
 	/*
-	 * If the GPU managed to complete this jobs fence, the timeout is
-	 * spurious. Bail out.
+	 * If the GPU managed to complete this jobs fence, the timeout has
+	 * fired before free-job worker. The timeout is spurious, so bail out.
 	 */
 	if (dma_fence_is_signaled(job->done_fence))
-		return DRM_GPU_SCHED_STAT_RESET;
+		return DRM_GPU_SCHED_STAT_NO_HANG;
 
 	/*
 	 * Panfrost IRQ handler may take a long time to process an interrupt
@@ -770,7 +770,7 @@ static enum drm_gpu_sched_stat panfrost_job_timedout(struct drm_sched_job
 
 	if (dma_fence_is_signaled(job->done_fence)) {
 		dev_warn(pfdev->dev, "unexpectedly high interrupt latency\n");
-		return DRM_GPU_SCHED_STAT_RESET;
+		return DRM_GPU_SCHED_STAT_NO_HANG;
 	}
 
 	dev_err(pfdev->dev, "gpu sched timeout, js=%d, config=0x%x, status=0x%x, head=0x%x, tail=0x%x, sched_job=%p",

-- 
2.49.0