07d92760d2
Introduce 'aspm_capable' field to maintain the capable ASPM setting of the link. By the 'aspm_capable', we don't need to recheck latency every time ASPM policy is changed. Each bit in 'aspm_capable' is associated to ASPM state (L0S/L1). The bit is set if the associated ASPM state is supported by the link and it satisfies the latency requirement (i.e. exit latency < endpoint acceptable latency). The 'aspm_capable' is updated when - an endpoint device is added (boot time or hot-plug time) - an endpoint device is removed (hot-unplug time) - PCI power state is changed. 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>