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drm/amd/sched: NULL out the s_fence field after run_job

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amd_sched_process_job drops the fence reference, so NULL out the s_fence
field before adding it as a callback to guard against accidentally using
s_fence after it may have be freed.

v2: add a clarifying comment

Signed-off-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Andres Rodriguez <andresx7@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicolai Hähnle 2017-09-28 11:51:32 +02:00 • committed by Alex Deucher
parent 214a91e6bf
commit 29d2535535
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
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@ -611,6 +611,10 @@ static int amd_sched_main(void *param)
fence = sched->ops->run_job(sched_job);
amd_sched_fence_scheduled(s_fence);
/* amd_sched_process_job drops the job's reference of the fence. */
sched_job->s_fence = NULL;
if (fence) {
s_fence->parent = dma_fence_get(fence);
r = dma_fence_add_callback(fence, &s_fence->cb,