Re: [PATCH] thunderbolt: Fix PCIe device enumeration with delayed rescan

Jayi Li
2026-02-04T02:38:08Z

在 2026/2/3 18:07, Mika Westerberg 写道:
> On Tue, Feb 03, 2026 at 06:00:06PM +0800, Jayi Li wrote:
>>>> I'm not sure if this is relevant to this issue, but sharing just in case.
>>> Thanks for sharing!
>>>
>>> It could be. What device this is?
>> The device is Targus DOCK221.
> Is the host Intel or AMD (well can you share bit more details about the
> topology)? Then if you block runtime PM of the PCIe Downstream Port that
> leads to the TB3 device like:
>
> # echo on > /sys/bus/pci/devices/DEVICE/power/control
>
> Does it work?

The host is ASMedia.

ASMedia Host (0-0, domain0)
|
└─ Port 3 ──→ Thunderbolt 3 Dock (0-3)

I tried disabling runtime PM by writing 'on' to power/control for the
downstream port, but it did not work.