On Dell Venue 8 Pro 5855 tablet installing tlp or running "powertop --
auto-tune" cause "xHCI host controller not responding, assume dead"
error, when error happen two integrated USB devices (Bluetooth adapter
and LTE modem) disappear until reboot. First time this issue was
observer in Linux 4.13 and still present in Linux 4.16. Blacklisting
both "Linux Foundation 3.0 root hub" from autosuspend in tlp
configuration is workaround for this issue, however on other devices
tlp works fine without blacklisting usb hub autosuspend, and on this
tablet there was no such issue before (at least in Linux ~4.8-4.12
range) so I assume there is regression somewhere.

Is there any related commits between 4.12 and 4.13 that I could try to

How issue looks like in logs:

[  227.258385] xhci_hcd 0000:00:14.0: xHC is not running.
[  329.671544] xhci_hcd 0000:00:14.0: xHC is not running.
[  416.695796] xhci_hcd 0000:00:14.0: xHC is not running.
[  416.695862] xhci_hcd 0000:00:14.0: xHCI host controller not
responding, assume dead
[  416.695900] xhci_hcd 0000:00:14.0: HC died; cleaning up
[  416.696052] usb 1-3: USB disconnect, device number 2
[  416.815610] cdc_mbim 1-3:1.12 wwp0s20u3i12: unregister 'cdc_mbim'
usb-0000:00:14.0-3, CDC MBIM
[  416.847934] usb 1-4: USB disconnect, device number 3

After that Bluetooth adapter and LTE modem disappear from lsusb output,
while xHCI controller itself remain visible.
Complete dmesg: https://paste.fedoraproject.org/paste/7aMpVGLfZ82zppdGs
lsusb -v: https://paste.fedoraproject.org/paste/c7y8GisC13YdzcYE9B-JIw
dsdt.dsl: https://paste.fedoraproject.org/paste/8g6mp2dafypUkFT4sa43iA
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