[PATCH 3/4] drm/amdgpu: Signal page table fence after gfx vm flush

[Philip Yang <Philip.Yang@xxxxxxx>]

To free page table BOs which are fenced and freed when updating page
table.

Signed-off-by: Philip Yang <Philip.Yang@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index e0d3e3aa2e31..10d63256d26b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -219,6 +219,13 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
 			amdgpu_ring_undo(ring);
 			return r;
 		}
+
+		if (vm) {
+			/* Signal fence to free page table BO */
+			dma_fence_signal(vm->pt_fence);
+			dma_fence_put(vm->pt_fence);
+			vm->pt_fence = amdgpu_pt_fence_create();
+		}
 	}
 
 	amdgpu_ring_ib_begin(ring);
-- 
2.35.1