lkml.org 
[lkml]   [2023]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH 2/2] PCI: Ignore PCIe ports used for tunneling in pcie_bandwidth_available()
From
On 11/2/2023 10:21, Lukas Wunner wrote:
> On Wed, Nov 01, 2023 at 08:14:31PM -0500, Mario Limonciello wrote:
>> Considering this I think it's a good idea to move that creation of the
>> device link into drivers/pci/pci-acpi.c and store a bit in struct pci_device
>> to indicate it's a tunneled port.
>>
>> Then 'thunderbolt' can look for this directly instead of walking all the FW
>> nodes.
>>
>> pcie_bandwidth_available() can just look at the tunneled port bit instead of
>> the existence of the device link.
>
> pci_is_thunderbolt_attached() should already be doing exactly what
> you want to achieve with the new bit. It tells you whether a PCI
> device is behind a Thunderbolt tunnel. So I don't think a new bit
> is actually needed.
>
> Thanks,
>
> Lukas

It's only for a device connected to an Intel TBT3 controller though; it
won't apply to USB4.

\
 
 \ /
  Last update: 2023-11-02 16:30    [W:0.106 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site