I have a 5-port USB 2.0 hub attached to a USB 3.0 host by a long length of Cat 5e cable (via a pair of cheap USB<->Cat5e adapters from eBay) that only works at full speed and doesn't stay connected all the time. This wouldn't be a problem except that the kernel can get stuck in a loop with the "URB transfer length is wrong, xHC issue?" error. The message "hub_ext_port_status failed (err = -71)" in particular can occur 70+ times for every instance of this error. There's no guarantee that it will ever disconnect the device and stop doing this, it has previously suddenly started generating 30MB/minute of log messages for 30 minutes until I unplugged the device. Would it be ok to rate limit both of these messages to reduce the impact of poor connections? 2016-06-17T09:56:09.219+01:00 <warning> kernel: xhci_hcd 0000:00:14.0: URB transfer length is wrong, xHC issue? req. len = 4, act. len = 4294967292 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = 0) 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.219+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.220+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.223+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:09.224+01:00 <info> kernel: usb 1-13: USB disconnect, device number 46 2016-06-17T09:56:09.224+01:00 <err> kernel: hub 1-13:1.0: activate --> -19 2016-06-17T09:56:09.499+01:00 <info> kernel: usb 1-13: new full-speed USB device number 47 using xhci_hcd 2016-06-17T09:56:09.795+01:00 <info> kernel: usb 1-13: new full-speed USB device number 48 using xhci_hcd 2016-06-17T09:56:09.920+01:00 <err> kernel: usb 1-13: device descriptor read/all, error -71 2016-06-17T09:56:10.223+01:00 <info> kernel: usb 1-13: new full-speed USB device number 50 using xhci_hcd 2016-06-17T09:56:10.351+01:00 <err> kernel: usb 1-13: device descriptor read/all, error -71 2016-06-17T09:56:10.463+01:00 <info> kernel: usb 1-13: new full-speed USB device number 51 using xhci_hcd 2016-06-17T09:56:10.595+01:00 <info> kernel: usb 1-13: not running at top speed; connect to a high speed hub 2016-06-17T09:56:10.599+01:00 <info> kernel: usb 1-13: New USB device found, idVendor=0835, idProduct=8500 2016-06-17T09:56:10.599+01:00 <info> kernel: usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=0 2016-06-17T09:56:10.599+01:00 <info> kernel: usb 1-13: Product: USB2.0 Hub 2016-06-17T09:56:10.600+01:00 <info> kernel: usb 1-13: Manufacturer: Action Star 2016-06-17T09:56:10.600+01:00 <warning> kernel: usb 1-13: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes 2016-06-17T09:56:10.600+01:00 <info> kernel: hub 1-13:1.0: USB hub found 2016-06-17T09:56:10.600+01:00 <info> kernel: hub 1-13:1.0: 5 ports detected 2016-06-17T09:56:10.703+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.704+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.705+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.705+01:00 <info> kernel: usb 1-13: USB disconnect, device number 51 2016-06-17T09:56:10.705+01:00 <err> kernel: hub 1-13:1.0: hub_ext_port_status failed (err = -71) 2016-06-17T09:56:10.705+01:00 <err> kernel: hub 1-13:1.0: activate --> -19 2016-06-17T09:56:10.979+01:00 <info> kernel: usb 1-13: new full-speed USB device number 52 using xhci_hcd 2016-06-17T09:56:11.107+01:00 <info> kernel: usb 1-13: not running at top speed; connect to a high speed hub 2016-06-17T09:56:11.107+01:00 <info> kernel: usb 1-13: New USB device found, idVendor=0835, idProduct=8500 2016-06-17T09:56:11.108+01:00 <info> kernel: usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=0 2016-06-17T09:56:11.108+01:00 <info> kernel: usb 1-13: Product: USB2.0 Hub 2016-06-17T09:56:11.108+01:00 <info> kernel: usb 1-13: Manufacturer: Action Star 2016-06-17T09:56:11.108+01:00 <warning> kernel: usb 1-13: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes 2016-06-17T09:56:11.108+01:00 <info> kernel: hub 1-13:1.0: USB hub found 2016-06-17T09:56:11.109+01:00 <info> kernel: hub 1-13:1.0: 5 ports detected 2016-06-17T09:56:11.387+01:00 <info> kernel: usb 1-13.1: new full-speed USB device number 53 using xhci_hcd 2016-06-17T09:56:11.475+01:00 <info> kernel: usb 1-13.1: not running at top speed; connect to a high speed hub 2016-06-17T09:56:11.479+01:00 <info> kernel: usb 1-13.1: New USB device found, idVendor=0835, idProduct=8501 2016-06-17T09:56:11.479+01:00 <info> kernel: usb 1-13.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 2016-06-17T09:56:11.479+01:00 <info> kernel: usb 1-13.1: Product: USB HID 2016-06-17T09:56:11.480+01:00 <info> kernel: usb 1-13.1: Manufacturer: Action Star 2016-06-17T09:56:11.483+01:00 <info> kernel: hid-generic 0003:0835:8501.000D: hiddev0,hidraw0: USB HID v1.11 Device [Action Star USB HID] on usb-0000:00:14.0-13.1/input0 2016-06-17T09:56:11.555+01:00 <info> kernel: usb 1-13.5: new full-speed USB device number 54 using xhci_hcd 2016-06-17T09:56:13.095+01:00 <info> kernel: usb 1-13.5: not running at top speed; connect to a high speed hub 2016-06-17T09:56:13.099+01:00 <info> kernel: usb 1-13.5: New USB device found, idVendor=0835, idProduct=8500 2016-06-17T09:56:13.099+01:00 <info> kernel: usb 1-13.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0 2016-06-17T09:56:13.099+01:00 <info> kernel: usb 1-13.5: Product: USB2.0 Hub 2016-06-17T09:56:13.099+01:00 <info> kernel: usb 1-13.5: Manufacturer: Action Star 2016-06-17T09:56:13.099+01:00 <warning> kernel: usb 1-13.5: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes 2016-06-17T09:56:13.099+01:00 <info> kernel: hub 1-13.5:1.0: USB hub found 2016-06-17T09:56:13.099+01:00 <info> kernel: hub 1-13.5:1.0: 5 ports detected 2016-06-17T09:56:13.375+01:00 <info> kernel: usb 1-13.5.1: new full-speed USB device number 55 using xhci_hcd 2016-06-17T09:56:13.463+01:00 <info> kernel: usb 1-13.5.1: not running at top speed; connect to a high speed hub 2016-06-17T09:56:13.467+01:00 <info> kernel: usb 1-13.5.1: New USB device found, idVendor=0835, idProduct=8502 2016-06-17T09:56:13.467+01:00 <info> kernel: usb 1-13.5.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 2016-06-17T09:56:13.468+01:00 <info> kernel: usb 1-13.5.1: Product: USB HID 2016-06-17T09:56:13.468+01:00 <info> kernel: usb 1-13.5.1: Manufacturer: Action Star 2016-06-17T09:56:13.471+01:00 <info> kernel: hid-generic 0003:0835:8502.000E: hiddev0,hidraw3: USB HID v1.11 Device [Action Star USB HID] on usb-0000:00:14.0-13.5.1/input0 -- Simon Arlott -- 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
