21.10.2021 17:57, Dmitry Osipenko пишет:

It might be wrong to disable device_may_wakeup() because it will change
the system suspend-resume behaviour, i.e. you won't be able to resume by
USB event, see [1].

[1]
https://elixir.bootlin.com/linux/v5.15-rc6/source/drivers/usb/host/xhci-tegra.c#L1962

Although, I'm not sure whether this is a correct behaviour to start
with. Previously, before the offending commit, device_wakeup was never
enabled for tegra-xusb. Commit message doesn't explain why wakeup is now
enabled unconditionally, wakeup checks aren't needed at all then. This
makes no sense, please check it with JC Kuo.

I looked at it again and now see that disabling wakeup actually should
restore the old code behaviour properly because previously wakeup wasn't
ever enabled. Alright, I'll prepare v2.