drm/ttm: delay freeing of old node during move_memcpy until after iounmap

Drivers using their own implementation of io_mem_reserve/io_mem_free are
likely to store the tracking information for the map in mem.mm_node, so
it can't be freed while still mapped.

Signed-off-by: Ben Skeggs<bskeggs@redhat.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/ttm/ttm_bo_util.c b/drivers/gpu/drm/ttm/ttm_bo_util.c
index a89839f..77dbf40 100644 (file)
--- a/drivers/gpu/drm/ttm/ttm_bo_util.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_util.c
@@ -370,7 +370,6 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
        }
        mb();
 out2:
-       ttm_bo_free_old_node(bo);
        old_copy = *old_mem;
        *old_mem = *new_mem;
        new_mem->mm_node = NULL;
@@ -385,6 +384,7 @@ out1:
        ttm_mem_reg_iounmap(bdev, old_mem, new_iomap);
 out:
        ttm_mem_reg_iounmap(bdev, &old_copy, old_iomap);
+       ttm_bo_mem_put(bo, &old_copy);
        return ret;
 }
 EXPORT_SYMBOL(ttm_bo_move_memcpy);