Re: [PATCH 1/1] drm/ttm: Ignore signaled move fences

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Am 27.02.21 um 04:45 schrieb Felix Kuehling:
Move fences that have already signaled should not prevent memory
allocations with no_wait_gpu.

Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>

Reviewed-by: Christian König <christian.koenig@xxxxxxx>

---
  drivers/gpu/drm/ttm/ttm_bo.c | 3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 3a10bebb75d6..de1ec838cf8b 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -730,8 +730,9 @@ static int ttm_bo_add_move_fence(struct ttm_buffer_object *bo,
  		return 0;
if (no_wait_gpu) {
+		ret = dma_fence_is_signaled(fence) ? 0 : -EBUSY;
  		dma_fence_put(fence);
-		return -EBUSY;
+		return ret;
  	}
dma_resv_add_shared_fence(bo->base.resv, fence);

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