drm/nouveau/ttm: fix crash as a result of a recent ttm change

"drm/ttm: callback move_notify any time bo placement change v4" failed to
avoid a NULL pointer dereference in nouveau caused by move_notify being
expected to handle that case now.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

3 files changed, 6 insertions, 7 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index f12dd0f39211..8cf4a48f872e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -682,8 +682,7 @@ nouveau_vma_getmap(struct nouveau_channel *chan, struct nouveau_bo *nvbo,
         if (mem->mem_type == TTM_PL_VRAM)
                 nouveau_vm_map(vma, node);
         else
-                nouveau_vm_map_sg(vma, 0, mem->num_pages << PAGE_SHIFT,
-                                  node, node->pages);
+                nouveau_vm_map_sg(vma, 0, mem->num_pages << PAGE_SHIFT, node);
 
         return 0;
 }
@@ -810,7 +809,6 @@ out:
 static void
 nouveau_bo_move_ntfy(struct ttm_buffer_object *bo, struct ttm_mem_reg *new_mem)
 {
-        struct nouveau_mem *node = new_mem->mm_node;
         struct nouveau_bo *nvbo = nouveau_bo(bo);
         struct nouveau_vma *vma;
 
@@ -822,7 +820,7 @@ nouveau_bo_move_ntfy(struct ttm_buffer_object *bo, struct ttm_mem_reg *new_mem)
                     nvbo->page_shift == vma->vm->spg_shift) {
                         nouveau_vm_map_sg(vma, 0, new_mem->
                                           num_pages << PAGE_SHIFT,
-                                          node, node->pages);
+                                          new_mem->mm_node);
                 } else {
                         nouveau_vm_unmap(vma);
                 }
@@ -1173,7 +1171,7 @@ nouveau_bo_vma_add(struct nouveau_bo *nvbo, struct nouveau_vm *vm,
                 nouveau_vm_map(vma, nvbo->bo.mem.mm_node);
         else
         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
-                nouveau_vm_map_sg(vma, 0, size, node, node->pages);
+                nouveau_vm_map_sg(vma, 0, size, node);
 
         list_add_tail(&vma->head, &nvbo->vma_list);
         vma->refcount = 1;
diff --git a/drivers/gpu/drm/nouveau/nouveau_vm.c b/drivers/gpu/drm/nouveau/nouveau_vm.c
index ef0832b29ad2..2bf6c0350b4b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_vm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_vm.c
@@ -78,9 +78,10 @@ nouveau_vm_map(struct nouveau_vma *vma, struct nouveau_mem *node)
 
 void
 nouveau_vm_map_sg(struct nouveau_vma *vma, u64 delta, u64 length,
-                  struct nouveau_mem *mem, dma_addr_t *list)
+                  struct nouveau_mem *mem)
 {
         struct nouveau_vm *vm = vma->vm;
+        dma_addr_t *list = mem->pages;
         int big = vma->node->type != vm->spg_shift;
         u32 offset = vma->node->offset + (delta >> 12);
         u32 bits = vma->node->type - 12;
diff --git a/drivers/gpu/drm/nouveau/nouveau_vm.h b/drivers/gpu/drm/nouveau/nouveau_vm.h
index 6ce995f7797e..4fb6e728734d 100644
--- a/drivers/gpu/drm/nouveau/nouveau_vm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_vm.h
@@ -89,7 +89,7 @@ void nouveau_vm_map_at(struct nouveau_vma *, u64 offset, struct nouveau_mem *);
 void nouveau_vm_unmap(struct nouveau_vma *);
 void nouveau_vm_unmap_at(struct nouveau_vma *, u64 offset, u64 length);
 void nouveau_vm_map_sg(struct nouveau_vma *, u64 offset, u64 length,
-                       struct nouveau_mem *, dma_addr_t *);
+                       struct nouveau_mem *);
 
 /* nv50_vm.c */
 void nv50_vm_map_pgt(struct nouveau_gpuobj *pgd, u32 pde,