Messages in this thread Patch in this message | | | From | Daniel Scally <> | Subject | [PATCH 04/18] software_node: Enforce parent before child ordering of nodes array for software_node_register_nodes() | Date | Mon, 30 Nov 2020 13:31:15 +0000 |
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Registering software_nodes with the .parent member set to point to a currently unregistered software_node has the potential for problems, so enforce parent -> child ordering in arrays passed to this function.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Daniel Scally <djrscally@gmail.com> --- Changes since RFC v3:
Patch introduced
drivers/base/swnode.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/base/swnode.c b/drivers/base/swnode.c index 615a0c93e116..af7930b3679e 100644 --- a/drivers/base/swnode.c +++ b/drivers/base/swnode.c @@ -700,14 +700,21 @@ int software_node_register_nodes(const struct software_node *nodes) int i; for (i = 0; nodes[i].name; i++) { + if (nodes[i].parent) + if (!software_node_to_swnode(nodes[i].parent)) { + ret = -EINVAL; + goto err_unregister_nodes; + } + ret = software_node_register(&nodes[i]); - if (ret) { - software_node_unregister_nodes(nodes); - return ret; - } + if (ret) + goto err_unregister_nodes; } return 0; +err_unregister_nodes: + software_node_unregister_nodes(nodes); + return ret; } EXPORT_SYMBOL_GPL(software_node_register_nodes); -- 2.25.1
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