[PATCH 13/18] drm/amdgpu: allocate dma_fence slot explicitly for rearming eviction fence

[Prike Liang <Prike.Liang@amd.com>]

It needn't to explicitly reserve the dma_resv slot here, the slot
should ideally be reserved at the call site (e.g., amdgpu_userq_vm_
validate_and_restore_queue()). This patch is needed as a workaround
in the meantime

Signed-off-by: Prike Liang <Prike.Liang@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
index 93307cbf55dc..11ae2558f3fe 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.c
@@ -126,9 +126,13 @@ int amdgpu_evf_mgr_attach_fence(struct amdgpu_eviction_fence_mgr *evf_mgr,
 
 		amdgpu_bo_placement_from_domain(bo, bo->allowed_domains);
 		ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
-		if (!ret)
-			dma_resv_add_fence(resv, ev_fence,
-					   DMA_RESV_USAGE_BOOKKEEP);
+		if (!ret) {
+			/*TODO: Figure out where the reserve fence slots are missing. */
+			ret = dma_resv_reserve_fences(resv, 1);
+			if (!ret)
+				dma_resv_add_fence(resv, ev_fence,
+						   DMA_RESV_USAGE_BOOKKEEP);
+		}
 	} else {
 		ret = 0;
 	}
-- 
2.34.1