问题
Assume a USB devices is powered by USB bus. Sometimes the firmware in the USB device encounter a problem and can't recovery by itself. I have to unplug and plug the USB device from the host.
Is there a way that I can dis-power the USB device, and later re-enable the USB device in Linux driver or in shell command?
By the way, I need a standard method. In specific platforms, I can disable the USB EHCI/OHCI's power in driver.
来源：https://stackoverflow.com/questions/16661280/in-linux-driver-how-to-disable-a-specific-usb-device