[Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221103

--- Comment #17 from Paul Alesius (paul@unnservice.com) ---
(In reply to Michał Pecio from comment #16)
> Would this fix it as well?
> 
> echo 'on' > /sys/bus/pci/devices/<pci-id>/power/control

I am now able to use netconsole to capture the logs during the freeze. This is
all that is logged when the bug occurs and the system freezes:

cat netconsole-2026-02-23-1819.log-output-during-bug
[  549.009867] xhci_hcd 0000:7a:00.4: Controller not ready at resume -19
[  549.009891] xhci_hcd 0000:7a:00.4: PCI post-resume error -19!
[  549.009894] xhci_hcd 0000:7a:00.4: HC died; cleaning up

And then I tried with control=on on the affected device
(/sys/bus/pci/devices/0000:7a:00.4/power/control), it seems to have eliminated
the bug and system freeze. Control defaults to auto on the affected device as
you said.

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