dmesg | grep -i xhci
[    2.447476] xhci-hcd xhci-hcd.8.auto: xHCI Host Controller
[    2.447782] xhci-hcd xhci-hcd.8.auto: new USB bus registered, assigned bus number 4
[    2.448025] xhci-hcd xhci-hcd.8.auto: hcc params 0x0220fe64 hci version 0x110 quirks 0x00210010
[    2.448125] xhci-hcd xhci-hcd.8.auto: irq 181, io mem 0xff600000
[    2.448405] usb usb4: Product: xHCI Host Controller
[    2.448413] usb usb4: Manufacturer: Linux 4.4.70-rockchip-ayufan-85 xhci-hcd
[    2.448420] usb usb4: SerialNumber: xhci-hcd.8.auto
[    2.449811] xhci-hcd xhci-hcd.8.auto: xHCI Host Controller
[    2.450091] xhci-hcd xhci-hcd.8.auto: new USB bus registered, assigned bus number 5
[    2.450439] usb usb5: Product: xHCI Host Controller
[    2.450446] usb usb5: Manufacturer: Linux 4.4.70-rockchip-ayufan-85 xhci-hcd
[    2.450453] usb usb5: SerialNumber: xhci-hcd.8.auto
[    2.765191] usb 5-1: new SuperSpeed USB device number 2 using xhci-hcd
[    3.873555] xhci-hcd xhci-hcd.8.auto: ERROR Transfer event for disabled endpoint or incorrect stream ring
[    3.880152] xhci-hcd xhci-hcd.8.auto: @00000000f39b9420 00000000 00000000 1b000000 01038001