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cc1e27e525
Simplify the LLDP code by using driver-private data to hold the LLDP settings block, instead of using a separate allocation. This avoids the need to maintain a list of LLDP settings blocks (since the LLDP settings block pointer can always be obtained using netdev_priv()) and obviates several failure paths. Any recorded LLDP data is now freed when the network device is unregistered, since there is no longer a dedicated reference counter for the LLDP settings block. To minimise surprise, we also now explicitly unregister the settings block. This is not strictly necessary (since the block will be automatically unregistered when the parent network device settings block is unregistered), but it maintains symmetry between lldp_probe() and lldp_remove(). The overall reduction in the size of the LLDP code is around 15%. Signed-off-by: Michael Brown <mcb30@ipxe.org>
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