Possible regression between 4.9 and 4.13

[Lukas Wunner]

On Tue, Aug 29, 2017 at 04:28:53PM +0300, Mathias Nyman wrote:
> This tight check was originally done to detect pci hotplug removed
> hosts as soon as possible.

In Mason's case, the parent of the XHCI controller isn't a hotplug port,
see this lspci output:

https://www.spinics.net/lists/linux-usb/msg160010.html

Please check is_hotplug_bridge in the parent's struct pci_dev before
assuming that the XHCI controller was unplugged.

Thanks,

Lukas