[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 #6 from Paul Alesius (paul@unnservice.com) ---
> Works just fine for me here, perhaps this is a bug in your USB device
(or hub) that can not handle USB config requests?

I don't know. It seems to be related to boards with X670 or X870 chipset and
Ryzen/Threadripper. From what I can gather from ADB report comments:

Asus Strix X670E-F Gaming BIOS 3402
Asus PRIME X670E-PRO WIFI
Asus ProArt X870-E (My board)
Dell Precision 7875 

But since it triggers so reliably on that specific root hub on my machine, it
made me suspect that it's in the kernel. The machine has been restarted many
times and it's still while opening that specific root hub, which I think are
created by the XHCI_hcd if I'm not mistaken.

> Does your system still crash if you remove the ioctl() and simply open and
> close the usbfs file?

I will try removing the ioctl now

Thank you

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