On 2013/3/28 2:47, Alan Stern wrote:
On Thu, 28 Mar 2013, Lan Tianyu wrote What happens if there's no device plugged in to the port, but the hub is enabled for remote wakeup? How will the hub be able to detect a plug-in event if the port isn't powered? Alan Stern
Hi Alan: Great thanks for your review. The hub will not detect the new devices. From my opinion, this depends on the user space since the port only will be powered off when pm qos NO_POWER_OFF flag is unset(it is default to be set). If unset the flag, losing plug-in event should have been took into account. -- Best Regards Tianyu Lan linux kernel enabling team -- 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
