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From e058320957ab91b7f4fcf566951abad3aa549ee9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Mon, 16 Jul 2018 13:47:34 +0200
Subject: [PATCH 4969/5725] drm/amdgpu: allow for more flexible priority
handling
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index 19e45a3..93794a8 100644
--- 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 amdgpu_ring *ring,
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)
--
2.7.4
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