Hi, I'm using Kernel release 3.4 with an embedded xhci host controller Seems USB core driver does not allow xhci controller to send a get device descriptor at address zero As when a device is attached to the root hub, usb core driver reset the device and if the link is superspeed than do a set_address LeCroy Compliance test TD7.06 Data Payload Packet Framing Robustness test script expects for get device descriptor at @ zero from host How to let xhci controller sending a get device descriptor command before setting an address to USB3 device ? Thanks, Aymen -- 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