[PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for POLICY_DEFAULT

Patel, Mayurkumar mayurkumar.patel at intel.com
Mon Mar 13 01:49:30 PDT 2017

>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.

Thanks Bjorn and Sinan. I will wait for new patch-sets from 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.
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