linux-kernel - RE: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for POLICY

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Message-ID: <92EBB4272BF81E4089A7126EC1E7B28466670D75@IRSMSX101.ger.corp.intel.com>
Date:   Mon, 13 Mar 2017 08:49:30 +0000
From:   "Patel, Mayurkumar" <mayurkumar.patel@...el.com>
To:     Sinan Kaya <okaya@...eaurora.org>,
        Bjorn Helgaas <helgaas@...nel.org>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "timur@...eaurora.org" <timur@...eaurora.org>,
        "linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for
 POLICY_DEFAULT


>
>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

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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