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bca5119762
This patch adds 2 APIs, as well as driver operations to support adding and deleting an IB sub device, which provides part of functionalities of it's parent. A sub device has a type; for a sub device with type "SMI", it provides the smi capability through umad for its parent, meaning uverb is not supported. A sub device cannot live without a parent. So when a parent is released, all it's sub devices are released as well. Signed-off-by: Mark Zhang <markzhang@nvidia.com> Link: https://lore.kernel.org/r/44253f7508b21eb2caefea3980c2bc072869116c.1718553901.git.leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@nvidia.com>