[PATCH 17/31] drm/amdgpu: fix syncing to VM updates

[Alex Deucher]

From: Christian König <christian.koenig at amd.com>

Signed-off-by: Christian König <christian.koenig at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 105a3b5..2c42f50 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -122,11 +122,24 @@ int amdgpu_sync_resv(struct amdgpu_device *adev,
 		f = rcu_dereference_protected(flist->shared[i],
 					      reservation_object_held(resv));
 		fence = f ? to_amdgpu_fence(f) : NULL;
-		if (fence && fence->ring->adev == adev &&
-		    fence->owner == owner &&
-		    fence->owner != AMDGPU_FENCE_OWNER_UNDEFINED)
+		if (fence && fence->ring->adev == adev) {
+			/* VM updates are only interesting
+			 * for other VM updates and moves.
+			 */
+			if ((owner != AMDGPU_FENCE_OWNER_MOVE) &&
+			    (fence->owner != AMDGPU_FENCE_OWNER_MOVE) &&
+			    ((owner == AMDGPU_FENCE_OWNER_VM) !=
+			     (fence->owner == AMDGPU_FENCE_OWNER_VM)))
 				continue;
 
+			/* Ignore fence from the same owner as
+			 * long as it isn't undefined.
+			 */
+			if (owner != AMDGPU_FENCE_OWNER_UNDEFINED &&
+			    fence->owner == owner)
+				continue;
+		}
+
 		r = amdgpu_sync_fence(adev, sync, f);
 		if (r)
 			break;
-- 
1.8.3.1