Hi, What is the expected behavior if a host controller does not implement bus_suspend and bus_resume? I am seeing that with the HWA HCD, kworker and khubd peg the CPU at 100% because the kernel is constantly calling hcd_bus_suspend and hcd_bus_resume. The calls to hcd_bus_suspend and hcd_bus_resume fail because hcd->bus_suspend and hcd->bus_resume are NULL. I have reproduced this behaviour using 3.11rc1 all the way back to 3.9.2. Thanks, Tom -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html