Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1599828

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

Show all headers | View raw

Hi Bjorn,

On 3/9/2017 5:27 PM, Bjorn Helgaas wrote:
> This is an aspect of the ASPM design that I don't like:
> 
>   - pcie_aspm_init_link_state() is called on a *bridge* after we've
>     enumerated any devices below the bridge, and we allocate the
>     link_state.
> 
>   - pcie_aspm_exit_link_state() is called on an *endpoint*, and if
>     we're removing the last endpoint below a bridge, we release the
>     *parent's* link_state.

I just posted V4 a minute ago. I divided ASPM init into two so that the
ASPM registers are captured in device_add path. 

There is a section of the ASPM init code that needs to walk all the devices
under the bridge. 

This section of the code is not working in device_add path as the link list
for child devices has not been set up yet. 

Unless you tell me there is a better way to handle this, I don't see how
we can remove the call from scan_slot. 

After further review, I think I can split PATCH V4 3/3 into two. Before
diving into too much clean up, I wanted to get some feedback as it is
obvious from the messed up cover letter.

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.

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for POLICY_DEFAULT Sinan Kaya <okaya@codeaurora.org> - 2017-03-08 21:50 +0100
  Re: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for  POLICY_DEFAULT Bjorn Helgaas <helgaas@kernel.org> - 2017-03-09 23:40 +0100
    Re: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for  POLICY_DEFAULT Sinan Kaya <okaya@codeaurora.org> - 2017-03-10 15:40 +0100
      RE: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for  POLICY_DEFAULT "Patel, Mayurkumar" <mayurkumar.patel@intel.com> - 2017-03-13 10:00 +0100
    Re: [PATCH V3] PCI/ASPM: reconfigure ASPM following hotplug for  POLICY_DEFAULT Sinan Kaya <okaya@codeaurora.org> - 2017-03-13 22:10 +0100

csiph-web