From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Mon, 16 Jul 2018 13:47:34 +0200
Subject: drm/amdgpu: allow for more flexible priority handling
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Git-commit: 9d46f32bdd3e9d4bf435c5ae50f72fb475bf0620
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Allow to call amdgpu_ring_priority_get() after pushing the ring to the
scheduler.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -211,7 +211,8 @@ void amdgpu_ring_priority_get(struct amd
if (!ring->funcs->set_priority)
return;
- atomic_inc(&ring->num_jobs[priority]);
+ if (atomic_inc_return(&ring->num_jobs[priority]) <= 0)
+ return;
mutex_lock(&ring->priority_mutex);
if (priority <= ring->priority)