[Bug 220936] ASMedia ASM4242 USB 3.2 xHCI Controller gives command timeout

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=220936

--- Comment #8 from Michał Pecio (michal.pecio@gmail.com) ---
"Clearing Run/Stop failed" is same thing as "xHC CMD_RUN timeout", somebody
reworded the error message, that's all. The chip should stop operation within
16ms of clearing the Run/Stop bit, but it still hasn't after 64ms.

Passing quirks=0x20000 parameter to xhci_hcd increases the timeout further to
640ms, so you could try that.

The issue occurs during PCI auto PM attempt (shutting down the whole controller
when all USB devices are idle) if you are seeing the message in normal
operation. Does it also show up when suspending the system?

Can we know if there are successful suspend/resume cycles, or does it fail on
the first try every time? Enabling this will produce some debug info in dmesg:

echo 'func xhci_suspend +p' >/proc/dynamic_debug/control
echo 'func xhci_resume +p' >/proc/dynamic_debug/control

The cause may be some remaining bug in the chip's FW or possibly out of spec
behavior by the kernel. For one, USB subsystem is not particularly good at
stopping drivers from trying to communicate with suspended devices and some
particular drivers may have bugs like that. The issue would go away when the
offending device is disconnected.

Are you able to compile and test patches?

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.