Hi Bjorn,

On 3/9/2017 5:27 PM, Bjorn Helgaas wrote:

How hard do you think it would be to rework this path slightly so we:

  - call pcie_aspm_init_link_state() for every device, maybe from
    pci_init_capabilities()

  - for bridges, have pcie_aspm_init_link_state() allocate a
    link_state, regardless of whether it currently has any children,
    and save the ASPM settings done by firmware

  - for endpoints, have pcie_aspm_init_link_state() do the actual ASPM
    setup of the link as it currently does

  - for endpoints, change pcie_aspm_exit_link_state() so it cleans up
    the device's own state and disables ASPM if necessary, but doesn't
    remove the parent's link_state

  - for bridges, change pcie_aspm_exit_link_state() so it frees the
    bridge's own link_state

Thanks for the feedback, Let me take a stab at this. 
Sinan

-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.