change v4

Hello Jerome Glisse,

This is a semi-automatic email about new static checker warnings.

The patch dc97b3409a79: "drm/ttm: callback move_notify any time bo placement change v4" from Nov 18, 2011, leads to the following Smatch complaint:

drivers/gpu/drm/nouveau/nouveau_bo.c +818 nouveau_bo_move_ntfy() warn: variable dereferenced before check 'new_mem' (see line 813)

drivers/gpu/drm/nouveau/nouveau_bo.c 812 { 813 struct nouveau_mem *node = new_mem->mm_node; ^^^^^^^^^^^^^^^^ Old dereference. new_mem can be NULL here these days.

814 struct nouveau_bo *nvbo = nouveau_bo(bo); 815 struct nouveau_vma *vma; 816 817 list_for_each_entry(vma, &nvbo->vma_list, head) { 818 if (new_mem && new_mem->mem_type == TTM_PL_VRAM) { ^^^^^^^ new check.

819 nouveau_vm_map(vma, new_mem->mm_node); 820 } else

regards, dan carpenter