usb 2-1: config 0 has no interface number 0
usb 2-1: config 0 interface 80 altsetting 0 has an invalid endpoint with address 0x0, skipping
usb 2-1: New USB device found, idVendor=3923, idProduct=718a, bcdDevice=ac.7d
usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 2-1: config 0 descriptor??
comedi comedi0: Wrong number of endpoints
ni6501 2-1:0.80: driver 'ni6501' failed to auto-configure device.
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0-rc3+ #7
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 dump_stack+0xca/0x13e
 register_lock_class+0x11ae/0x1240
 __lock_acquire+0xfb/0x37c0
 lock_acquire+0x100/0x2b0
 __mutex_lock+0xf9/0x12b0
 ni6501_detach+0x56/0x110
 comedi_device_detach+0xe8/0x800
 comedi_device_cleanup.part.0+0x63/0x140
 comedi_free_board_dev.part.0+0x11/0x90
 comedi_release_hardware_device+0x10c/0x140
 comedi_auto_config.cold+0x124/0x1b0
 usb_probe_interface+0x30d/0x7b0
 really_probe+0x296/0x680
 driver_probe_device+0xf9/0x200
 __device_attach_driver+0x1c4/0x230
 bus_for_each_drv+0x15e/0x1e0
 __device_attach+0x21e/0x360
 bus_probe_device+0x1ec/0x2a0
 device_add+0xaf4/0x1700
 usb_set_configuration+0xdf2/0x1670
 generic_probe+0x9d/0xd5
 usb_probe_device+0xa8/0x110
 really_probe+0x296/0x680
 driver_probe_device+0xf9/0x200
 __device_attach_driver+0x1c4/0x230
 bus_for_each_drv+0x15e/0x1e0
 __device_attach+0x21e/0x360
 bus_probe_device+0x1ec/0x2a0
 device_add+0xaf4/0x1700
 usb_new_device.cold+0x8b8/0x1030
 hub_event+0x1ac9/0x35a0
 process_one_work+0x90a/0x1580
 worker_thread+0x96/0xe20
 kthread+0x30e/0x420
 ret_from_fork+0x3a/0x50
dummy_hcd dummy_hcd.1: port status 0x00010100 has changes
usb 2-1: USB disconnect, device number 106
usb usb2: dummy_bus_suspend