[PATCH] drm/ttm: callback move_notify any time bo placement change

[j.glisse at gmail.com]

From: Jerome Glisse <jglisse at redhat.com>

Previously we were calling back move_notify in error path when the
bo is returned to it's original position or when destroy the bo.
When destroying the bo set the new mem placement as NULL when calling
back in the driver.

Updating nouveau to deal with NULL placement properly.

Reviewed-by: Jerome Glisse <jglisse at redhat.com>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c |    4 ++--
 drivers/gpu/drm/ttm/ttm_bo.c         |    6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 857bca4..f12dd0f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -815,10 +815,10 @@ nouveau_bo_move_ntfy(struct ttm_buffer_object *bo, struct ttm_mem_reg *new_mem)
 	struct nouveau_vma *vma;
 
 	list_for_each_entry(vma, &nvbo->vma_list, head) {
-		if (new_mem->mem_type == TTM_PL_VRAM) {
+		if (new_mem && new_mem->mem_type == TTM_PL_VRAM) {
 			nouveau_vm_map(vma, new_mem->mm_node);
 		} else
-		if (new_mem->mem_type == TTM_PL_TT &&
+		if (new_mem && new_mem->mem_type == TTM_PL_TT &&
 		    nvbo->page_shift == vma->vm->spg_shift) {
 			nouveau_vm_map_sg(vma, 0, new_mem->
 					  num_pages << PAGE_SHIFT,
diff --git a/drivers/gpu/drm/ttm/ttm_bo.c b/drivers/gpu/drm/ttm/ttm_bo.c
index de7ad99..786955a 100644
--- a/drivers/gpu/drm/ttm/ttm_bo.c
+++ b/drivers/gpu/drm/ttm/ttm_bo.c
@@ -147,6 +147,9 @@ static void ttm_bo_release_list(struct kref *list_kref)
 	BUG_ON(!list_empty(&bo->lru));
 	BUG_ON(!list_empty(&bo->ddestroy));
 
+	if (bdev->driver->move_notify)
+		bdev->driver->move_notify(bo, NULL);
+
 	if (bo->ttm)
 		ttm_tt_destroy(bo->ttm);
 	atomic_dec(&bo->glob->bo_count);
@@ -437,6 +440,9 @@ moved:
 	return 0;
 
 out_err:
+	if (bdev->driver->move_notify)
+		bdev->driver->move_notify(bo, &bo->mem);
+
 	new_man = &bdev->man[bo->mem.mem_type];
 	if ((new_man->flags & TTM_MEMTYPE_FLAG_FIXED) && bo->ttm) {
 		ttm_tt_unbind(bo->ttm);
-- 
1.7.7.1