[PATCH 2/2] drm/ttm: ensure ttm for new node is bound before calling move_notify()

[skeggsb@gmail.com]

From: Ben Skeggs <bskeggs@redhat.com>

This was true for new TTM_PL_SYSTEM and new TTM_PL_TT cases, but wasn't
the case on TTM_PL_SYSTEM<->TTM_PL_TT moves, which causes trouble on some
paths as nouveau's move_notify() hook requires that the dma addresses be
valid at this point.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
 drivers/gpu/drm/nouveau/nouveau_mem.c |    1 +
 drivers/gpu/drm/ttm/ttm_bo.c          |   10 ++++++----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 2eecf5d..b4af850 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -831,6 +831,7 @@ nouveau_gart_manager_fini(struct ttm_mem_type_manager *man)
 	return 0;
 }
 
+
 static void
 nouveau_gart_manager_del(struct ttm_mem_type_manager *man,
 			 struct ttm_mem_reg *mem)
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index 2e618b5..9095b5b 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -390,10 +390,12 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 	 * Create and bind a ttm if required.
 	 */
 
-	if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && (bo->ttm == NULL)) {
-		ret = ttm_bo_add_ttm(bo, false);
-		if (ret)
-			goto out_err;
+	if (!(new_man->flags & TTM_MEMTYPE_FLAG_FIXED)) {
+		if (bo->ttm == NULL) {
+			ret = ttm_bo_add_ttm(bo, false);
+			if (ret)
+				goto out_err;
+		}
 
 		ret = ttm_tt_set_placement_caching(bo->ttm, mem->placement);
 		if (ret)
-- 
1.7.6