Comment # 8 on bug 1142380 from Oliver Neukum

(In reply to Aman Vaishya from comment #7)

> 1. If the usb device(pen-drive in this case) is attached to the usb 2.0 port
> before putting the system to sleep, it works fine. I tried removing and
> re-inserting it into a different usb 2.0 port and saw that it was mounted.

OK, please activate dynamic debugging for xhci

echo "module xhci_hcd +mfp" > /sys/kernel/debug/dynamic_debug/control

And rerun the test without a device and plug it in after resume. Provide dmesg
after that. (No zipping)