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In the current ASPM implementation, there are many functions that take a pointer to struct pci_dev corresponding to the upstream component of the link as a parameter. But, since those functions handle PCI express link state, a pointer to struct pcie_link_state is more suitable than a pointer to struct pci_dev. Changing a parameter to a pointer to struct pcie_link_state makes ASPM code much simpler and easier to read. This patch also contains some minor cleanups. This patch doesn't have any functional change. Acked-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>