diff options
| author | Ingo Molnar <mingo@kernel.org> | 2016-08-18 18:41:12 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-08-18 18:41:12 +0200 |
| commit | f594d0b9b34aeb8e3ffa524eaa8a4085afb56d22 (patch) | |
| tree | 7ef81ad042bcfe78dc0f41e05cebfdbc268871c4 /drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | |
| parent | b3830e8d478cd9fe33e820425ce431c8ef280967 (diff) | |
| parent | 7b0501b1e7cddd32b265178e32d332bdfbb532d4 (diff) | |
Merge branch 'x86/urgent' into x86/asm, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c index d1558768cfb7..0b109aebfec6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c @@ -204,16 +204,25 @@ void amdgpu_fence_process(struct amdgpu_ring *ring) if (seq != ring->fence_drv.sync_seq) amdgpu_fence_schedule_fallback(ring); - while (last_seq != seq) { + if (unlikely(seq == last_seq)) + return; + + last_seq &= drv->num_fences_mask; + seq &= drv->num_fences_mask; + + do { struct fence *fence, **ptr; - ptr = &drv->fences[++last_seq & drv->num_fences_mask]; + ++last_seq; + last_seq &= drv->num_fences_mask; + ptr = &drv->fences[last_seq]; /* There is always exactly one thread signaling this fence slot */ fence = rcu_dereference_protected(*ptr, 1); RCU_INIT_POINTER(*ptr, NULL); - BUG_ON(!fence); + if (!fence) + continue; r = fence_signal(fence); if (!r) @@ -222,7 +231,7 @@ void amdgpu_fence_process(struct amdgpu_ring *ring) BUG(); fence_put(fence); - } + } while (last_seq != seq); } /** |