drm/amdgpu: use a dummy owner for sysfs triggered cleaner shaders v4

[ Upstream commit 447fab30955cf7dba7dd563f42b67c02284860c8 ]

Otherwise triggering sysfs multiple times without other submissions in
between only runs the shader once.

v2: add some comment
v3: re-add missing cast
v4: squash in semicolon fix

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 8b2ae7d492675e8af8902f103364bef59382b935)
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.c

@@ -1426,9 +1426,11 @@ static int amdgpu_gfx_run_cleaner_shader_job(struct amdgpu_ring *ring)
 	struct amdgpu_device *adev = ring->adev;
 	struct drm_gpu_scheduler *sched = &ring->sched;
 	struct drm_sched_entity entity;
+	static atomic_t counter;
 	struct dma_fence *f;
 	struct amdgpu_job *job;
 	struct amdgpu_ib *ib;
+	void *owner;
 	int i, r;
 
 	/* Initialize the scheduler entity */
@@ -1439,9 +1441,15 @@ static int amdgpu_gfx_run_cleaner_shader_job(struct amdgpu_ring *ring)
 		goto err;
 	}
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, &entity, NULL,
+	/*
-				     64, 0,
+	 * Use some unique dummy value as the owner to make sure we execute
-				     &job);
+	 * the cleaner shader on each submission. The value just need to change
+	 * for each submission and is otherwise meaningless.
+	 */
+	owner = (void *)(unsigned long)atomic_inc_return(&counter);
+
+	r = amdgpu_job_alloc_with_ib(ring->adev, &entity, owner,
+				     64, 0, &job);
 	if (r)
 		goto err;