[patch] nouveau: free the memory in nouveau_gart_manager_del()

[Dan Carpenter]

In the original code the kfree() doesn't do anything because
"mem->mm_node" has been set to NULL.  This was introduced in
d2f96666c56a "drm/nouveau: create temp vmas for both src and dst of
bo moves"

Signed-off-by: Dan Carpenter <erro...@gmail.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_mem.c 
b/drivers/gpu/drm/nouveau/nouveau_mem.c
index 765f0e5..ab79bf8 100644
--- a/drivers/gpu/drm/nouveau/nouveau_mem.c
+++ b/drivers/gpu/drm/nouveau/nouveau_mem.c
@@ -846,8 +846,8 @@ nouveau_gart_manager_del(struct ttm_mem_type_manager *man,
                         struct ttm_mem_reg *mem)
 {
        nouveau_mem_node_cleanup(mem->mm_node);
-       mem->mm_node = NULL;
        kfree(mem->mm_node);
+       mem->mm_node = NULL;
 }
 
 static int
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